mysql数据库基础（Linux基础，测试淘宝的购物车，有888瓶编了号码的水及10只健康的小白鼠）面试题

一、数据库基础
现有两张表，分别为账号表Account、考试成绩表Exam，字段定义如下：
Account 账号表
字段名 字段类型 字段说明
ID int 学员ID
Name varchar 学员姓名
Class varchar 学员班级，形如“高三一班”
Exam考试成绩表
字段名 字段类型 字段说明
ID int 主键ID
Course varchar 考试科目
如”英语”
Score int 考试成绩
AID Int 学员ID

请输出每个班的各学科平均分，查 询结果形如下表：
班级 考试科目 班级平均分
高三一班 语文 73.5
高三一班 数学 71.2
高三一班 英语 77.8
高三二班 语文 74.6
高三二班 数学 69.8
…… …… ……

select a.class,e.course,avg(e.score) from account as a,exam as e where a.id=e.aid group by a.class,e.course;

二、Linux基础

1. 如何清空a.log文件
   echo "" > a.log
   echo > a.log
2. 如何持续打印a.log文件中不包含abcd=1234的行
   Grep -v “abcd=1234” a.log
   sed -n ‘/abcd=1234/’ a.log
3. 如何在a.log文件中找到abcd=1234的行并将其替换为abcd=5678
   sed -i "s/abcd=1234字段/abcd=5678字段/g"

三、简答题

如果需要你来测试淘宝的购物车，你会如何设计测试用例，需要从哪些方面来考虑。

选中购物车后进入购物车是否弹出选择规格的页面
选择规格时是否能正确显示该商品的购买后额度评论和颜色分类尺码最低是什么码最高为什么码购买数量是否会显示库存
规格都选择完成后该商品的价格是否会显示最后确定的价格
购买数量+1或-1是否会使之前确定的单个价格发生变化
选择完毕规格后点击确认后是否直接进入购物车
点击加入购物车后商品是否能够直接进入购物车
点击确定后是否有提示如（添加成功）
提示添加成功后是返回上一级页面还是进入购物车
点击购物车是否会出现点击后无法进入或点击购物车但是确进入别的页面
成功进入购物车后是否正确的显示该用户曾选择加入购物车的商品
正确进入购物车后是否能显示购物车内的商品总数量是否能在上方正确显示购物车内的商品
是否显示该商品的店铺
是否正确显示该商品的介绍
是否能正确的显示该商品的规格
是否能正确的显示价格
如何使用优惠券
多选框是否能正常工作如选择多个是否能重新计算结算价格
是否能显示商品的本店活动点击参与活动和去凑单是否能进入活动页
进入活动页如何重新回到购物车
进入该店铺的活动点击领取活动奖品是否提示（领取成功）活动时间是否能正确显示
使用优惠券后是否会正确的减去折扣的优惠券而重新计算结算价格
全选框是否能正确工作多次点击是否会出现失效等操作
点击管理会弹出那些功能清理 移入收藏夹 删除
点击管理后移入收藏夹如何查看收藏夹（成功移入后是否会有提示如提示该商品已移入收藏夹
点击删除是否能删除成功
当进入管理后选择单个然后点击删除是否能删除成功如提示删除成功而该商品仍然存在或选择单个点击删除后是否会直接删除所有
选择全选后再点击删除是否能正确的删除成功删除除后提示（删除成功）
点击管理后再点击清理会提示购物车快满了现有商品数量建议清理较早的宝贝
正确显示购物车内的商品但是为购买的无法清理
当购物车为空时页面提示购物车竟然是空的在忙也要买点东西犒劳自己去逛逛
在购物车的下面提示推荐商品
所有商品移入收藏夹后点击完成按钮完成操作
当用户换一个地方登录后是否还能显示购物车内的商品

四、代码题（两道题任选其一做答）

1. 执行下面Python代码，请问输出结果是什么
   name = “a”
   def f1():
   print(name)
   def f2():
   name = “b”
   f1()
   f1()
   f2()

全部输出(a a b a None b None b None)
第二 A A
第三 A A B

2. 以下Java代码输出b，传入的x可能是几
   switch (x)
   {
   case 1: System.out.println("a");
   case 2:
   case 3:
   System.out.println("b");
   break;
   default:
   System.out.println("c");
   break;
   }

输出结果 3

五、逻辑题（两道题任选其一做答）

1. 有888瓶编了号码的水及10只健康的小白鼠，其中一瓶水有毒，小白鼠饮用毒水一天后会死，最少需要几天可以找到哪瓶水有毒？

2. 十个列表，每个小白鼠一个

a = []
b = []
c = []
d = []
e = []
f = []
g = []
h = []
i = []
j = []

888瓶水标签0-889

li = list(range(1, 889))

取出一瓶水，把标签十进制数字转化为二进制

for x in li:
# 定义一个空列表，存储每次二进制数，存进列表里的二进制数是字符格式的
li1 = []
er = bin(x)
# print (er)
for y in er:
if y == b:
continue
else:
li1.append(y)
# 把li1列表里的元素顺序反向排列
list.reverse(li1)
# print (li1)
# 计算li1列表里元素个数，根据元素个数生成一个列表，每次从li1里拿元素用
n = list(range(len(li1)))
# print (n)
for y in n:
# print (y)
# print (li1[y])
# print (x)
# print (type(li1[y]))
# li1这个二进制列表里拿一个数，这个数为1的时候，就是把原十进制数对应水编号给y小白鼠喝
if li1[y] == '1':
# print (x)
# print (type(y))
# print (y)
if y == 0:
# print (y)
a.append(x)
elif y == 1:
# print (y)
b.append(x)
elif y == 2:
c.append(x)
elif y == 3:
d.append(x)
elif y == 4:
e.append(x)
elif y == 5:
f.append(x)
elif y == 6:
g.append(x)
elif y == 7:
h.append(x)
elif y == 8:
i.append(x)
else:
j.append(x)
# else:
# continue
print("888瓶水打上标签，经过下面计算，每只小白鼠喝下下面计算的混合液。")
print("第一只小白鼠喝下水瓶标签：", a)
print("第二只小白鼠喝下水瓶标签：", b)
print("第三只小白鼠喝下水瓶标签：", c)
print("第四只小白鼠喝下水瓶标签：", d)
print("第五只小白鼠喝下水瓶标签：", e)
print("第六只小白鼠喝下水瓶标签：", f)
print("第七只小白鼠喝下水瓶标签：", g)
print("第八只小白鼠喝下水瓶标签：", h)
print("第九只小白鼠喝下水瓶标签：", i)
print("第十只小白鼠喝下水瓶标签：", j)
print("如果第一只，第三只，第五只小白鼠死了，就是0b0000010101（二进制数，转化为十进制数是21），第21瓶水有毒。")

888瓶水打上标签，经过下面计算，每只小白鼠喝下下面计算的混合液。
第一只小白鼠喝下水瓶标签： [1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99, 101, 103, 105, 107, 109, 111, 113, 115, 117, 119, 121, 123, 125, 127, 129, 131, 133, 135, 137, 139, 141, 143, 145, 147, 149, 151, 153, 155, 157, 159, 161, 163, 165, 167, 169, 171, 173, 175, 177, 179, 181, 183, 185, 187, 189, 191, 193, 195, 197, 199, 201, 203, 205, 207, 209, 211, 213, 215, 217, 219, 221, 223, 225, 227, 229, 231, 233, 235, 237, 239, 241, 243, 245, 247, 249, 251, 253, 255, 257, 259, 261, 263, 265, 267, 269, 271, 273, 275, 277, 279, 281, 283, 285, 287, 289, 291, 293, 295, 297, 299, 301, 303, 305, 307, 309, 311, 313, 315, 317, 319, 321, 323, 325, 327, 329, 331, 333, 335, 337, 339, 341, 343, 345, 347, 349, 351, 353, 355, 357, 359, 361, 363, 365, 367, 369, 371, 373, 375, 377, 379, 381, 383, 385, 387, 389, 391, 393, 395, 397, 399, 401, 403, 405, 407, 409, 411, 413, 415, 417, 419, 421, 423, 425, 427, 429, 431, 433, 435, 437, 439, 441, 443, 445, 447, 449, 451, 453, 455, 457, 459, 461, 463, 465, 467, 469, 471, 473, 475, 477, 479, 481, 483, 485, 487, 489, 491, 493, 495, 497, 499, 501, 503, 505, 507, 509, 511, 513, 515, 517, 519, 521, 523, 525, 527, 529, 531, 533, 535, 537, 539, 541, 543, 545, 547, 549, 551, 553, 555, 557, 559, 561, 563, 565, 567, 569, 571, 573, 575, 577, 579, 581, 583, 585, 587, 589, 591, 593, 595, 597, 599, 601, 603, 605, 607, 609, 611, 613, 615, 617, 619, 621, 623, 625, 627, 629, 631, 633, 635, 637, 639, 641, 643, 645, 647, 649, 651, 653, 655, 657, 659, 661, 663, 665, 667, 669, 671, 673, 675, 677, 679, 681, 683, 685, 687, 689, 691, 693, 695, 697, 699, 701, 703, 705, 707, 709, 711, 713, 715, 717, 719, 721, 723, 725, 727, 729, 731, 733, 735, 737, 739, 741, 743, 745, 747, 749, 751, 753, 755, 757, 759, 761, 763, 765, 767, 769, 771, 773, 775, 777, 779, 781, 783, 785, 787, 789, 791, 793, 795, 797, 799, 801, 803, 805, 807, 809, 811, 813, 815, 817, 819, 821, 823, 825, 827, 829, 831, 833, 835, 837, 839, 841, 843, 845, 847, 849, 851, 853, 855, 857, 859, 861, 863, 865, 867, 869, 871, 873, 875, 877, 879, 881, 883, 885, 887]
第二只小白鼠喝下水瓶标签： [2, 3, 6, 7, 10, 11, 14, 15, 18, 19, 22, 23, 26, 27, 30, 31, 34, 35, 38, 39, 42, 43, 46, 47, 50, 51, 54, 55, 58, 59, 62, 63, 66, 67, 70, 71, 74, 75, 78, 79, 82, 83, 86, 87, 90, 91, 94, 95, 98, 99, 102, 103, 106, 107, 110, 111, 114, 115, 118, 119, 122, 123, 126, 127, 130, 131, 134, 135, 138, 139, 142, 143, 146, 147, 150, 151, 154, 155, 158, 159, 162, 163, 166, 167, 170, 171, 174, 175, 178, 179, 182, 183, 186, 187, 190, 191, 194, 195, 198, 199, 202, 203, 206, 207, 210, 211, 214, 215, 218, 219, 222, 223, 226, 227, 230, 231, 234, 235, 238, 239, 242, 243, 246, 247, 250, 251, 254, 255, 258, 259, 262, 263, 266, 267, 270, 271, 274, 275, 278, 279, 282, 283, 286, 287, 290, 291, 294, 295, 298, 299, 302, 303, 306, 307, 310, 311, 314, 315, 318, 319, 322, 323, 326, 327, 330, 331, 334, 335, 338, 339, 342, 343, 346, 347, 350, 351, 354, 355, 358, 359, 362, 363, 366, 367, 370, 371, 374, 375, 378, 379, 382, 383, 386, 387, 390, 391, 394, 395, 398, 399, 402, 403, 406, 407, 410, 411, 414, 415, 418, 419, 422, 423, 426, 427, 430, 431, 434, 435, 438, 439, 442, 443, 446, 447, 450, 451, 454, 455, 458, 459, 462, 463, 466, 467, 470, 471, 474, 475, 478, 479, 482, 483, 486, 487, 490, 491, 494, 495, 498, 499, 502, 503, 506, 507, 510, 511, 514, 515, 518, 519, 522, 523, 526, 527, 530, 531, 534, 535, 538, 539, 542, 543, 546, 547, 550, 551, 554, 555, 558, 559, 562, 563, 566, 567, 570, 571, 574, 575, 578, 579, 582, 583, 586, 587, 590, 591, 594, 595, 598, 599, 602, 603, 606, 607, 610, 611, 614, 615, 618, 619, 622, 623, 626, 627, 630, 631, 634, 635, 638, 639, 642, 643, 646, 647, 650, 651, 654, 655, 658, 659, 662, 663, 666, 667, 670, 671, 674, 675, 678, 679, 682, 683, 686, 687, 690, 691, 694, 695, 698, 699, 702, 703, 706, 707, 710, 711, 714, 715, 718, 719, 722, 723, 726, 727, 730, 731, 734, 735, 738, 739, 742, 743, 746, 747, 750, 751, 754, 755, 758, 759, 762, 763, 766, 767, 770, 771, 774, 775, 778, 779, 782, 783, 786, 787, 790, 791, 794, 795, 798, 799, 802, 803, 806, 807, 810, 811, 814, 815, 818, 819, 822, 823, 826, 827, 830, 831, 834, 835, 838, 839, 842, 843, 846, 847, 850, 851, 854, 855, 858, 859, 862, 863, 866, 867, 870, 871, 874, 875, 878, 879, 882, 883, 886, 887]
第三只小白鼠喝下水瓶标签： [4, 5, 6, 7, 12, 13, 14, 15, 20, 21, 22, 23, 28, 29, 30, 31, 36, 37, 38, 39, 44, 45, 46, 47, 52, 53, 54, 55, 60, 61, 62, 63, 68, 69, 70, 71, 76, 77, 78, 79, 84, 85, 86, 87, 92, 93, 94, 95, 100, 101, 102, 103, 108, 109, 110, 111, 116, 117, 118, 119, 124, 125, 126, 127, 132, 133, 134, 135, 140, 141, 142, 143, 148, 149, 150, 151, 156, 157, 158, 159, 164, 165, 166, 167, 172, 173, 174, 175, 180, 181, 182, 183, 188, 189, 190, 191, 196, 197, 198, 199, 204, 205, 206, 207, 212, 213, 214, 215, 220, 221, 222, 223, 228, 229, 230, 231, 236, 237, 238, 239, 244, 245, 246, 247, 252, 253, 254, 255, 260, 261, 262, 263, 268, 269, 270, 271, 276, 277, 278, 279, 284, 285, 286, 287, 292, 293, 294, 295, 300, 301, 302, 303, 308, 309, 310, 311, 316, 317, 318, 319, 324, 325, 326, 327, 332, 333, 334, 335, 340, 341, 342, 343, 348, 349, 350, 351, 356, 357, 358, 359, 364, 365, 366, 367, 372, 373, 374, 375, 380, 381, 382, 383, 388, 389, 390, 391, 396, 397, 398, 399, 404, 405, 406, 407, 412, 413, 414, 415, 420, 421, 422, 423, 428, 429, 430, 431, 436, 437, 438, 439, 444, 445, 446, 447, 452, 453, 454, 455, 460, 461, 462, 463, 468, 469, 470, 471, 476, 477, 478, 479, 484, 485, 486, 487, 492, 493, 494, 495, 500, 501, 502, 503, 508, 509, 510, 511, 516, 517, 518, 519, 524, 525, 526, 527, 532, 533, 534, 535, 540, 541, 542, 543, 548, 549, 550, 551, 556, 557, 558, 559, 564, 565, 566, 567, 572, 573, 574, 575, 580, 581, 582, 583, 588, 589, 590, 591, 596, 597, 598, 599, 604, 605, 606, 607, 612, 613, 614, 615, 620, 621, 622, 623, 628, 629, 630, 631, 636, 637, 638, 639, 644, 645, 646, 647, 652, 653, 654, 655, 660, 661, 662, 663, 668, 669, 670, 671, 676, 677, 678, 679, 684, 685, 686, 687, 692, 693, 694, 695, 700, 701, 702, 703, 708, 709, 710, 711, 716, 717, 718, 719, 724, 725, 726, 727, 732, 733, 734, 735, 740, 741, 742, 743, 748, 749, 750, 751, 756, 757, 758, 759, 764, 765, 766, 767, 772, 773, 774, 775, 780, 781, 782, 783, 788, 789, 790, 791, 796, 797, 798, 799, 804, 805, 806, 807, 812, 813, 814, 815, 820, 821, 822, 823, 828, 829, 830, 831, 836, 837, 838, 839, 844, 845, 846, 847, 852, 853, 854, 855, 860, 861, 862, 863, 868, 869, 870, 871, 876, 877, 878, 879, 884, 885, 886, 887]
第四只小白鼠喝下水瓶标签： [8, 9, 10, 11, 12, 13, 14, 15, 24, 25, 26, 27, 28, 29, 30, 31, 40, 41, 42, 43, 44, 45, 46, 47, 56, 57, 58, 59, 60, 61, 62, 63, 72, 73, 74, 75, 76, 77, 78, 79, 88, 89, 90, 91, 92, 93, 94, 95, 104, 105, 106, 107, 108, 109, 110, 111, 120, 121, 122, 123, 124, 125, 126, 127, 136, 137, 138, 139, 140, 141, 142, 143, 152, 153, 154, 155, 156, 157, 158, 159, 168, 169, 170, 171, 172, 173, 174, 175, 184, 185, 186, 187, 188, 189, 190, 191, 200, 201, 202, 203, 204, 205, 206, 207, 216, 217, 218, 219, 220, 221, 222, 223, 232, 233, 234, 235, 236, 237, 238, 239, 248, 249, 250, 251, 252, 253, 254, 255, 264, 265, 266, 267, 268, 269, 270, 271, 280, 281, 282, 283, 284, 285, 286, 287, 296, 297, 298, 299, 300, 301, 302, 303, 312, 313, 314, 315, 316, 317, 318, 319, 328, 329, 330, 331, 332, 333, 334, 335, 344, 345, 346, 347, 348, 349, 350, 351, 360, 361, 362, 363, 364, 365, 366, 367, 376, 377, 378, 379, 380, 381, 382, 383, 392, 393, 394, 395, 396, 397, 398, 399, 408, 409, 410, 411, 412, 413, 414, 415, 424, 425, 426, 427, 428, 429, 430, 431, 440, 441, 442, 443, 444, 445, 446, 447, 456, 457, 458, 459, 460, 461, 462, 463, 472, 473, 474, 475, 476, 477, 478, 479, 488, 489, 490, 491, 492, 493, 494, 495, 504, 505, 506, 507, 508, 509, 510, 511, 520, 521, 522, 523, 524, 525, 526, 527, 536, 537, 538, 539, 540, 541, 542, 543, 552, 553, 554, 555, 556, 557, 558, 559, 568, 569, 570, 571, 572, 573, 574, 575, 584, 585, 586, 587, 588, 589, 590, 591, 600, 601, 602, 603, 604, 605, 606, 607, 616, 617, 618, 619, 620, 621, 622, 623, 632, 633, 634, 635, 636, 637, 638, 639, 648, 649, 650, 651, 652, 653, 654, 655, 664, 665, 666, 667, 668, 669, 670, 671, 680, 681, 682, 683, 684, 685, 686, 687, 696, 697, 698, 699, 700, 701, 702, 703, 712, 713, 714, 715, 716, 717, 718, 719, 728, 729, 730, 731, 732, 733, 734, 735, 744, 745, 746, 747, 748, 749, 750, 751, 760, 761, 762, 763, 764, 765, 766, 767, 776, 777, 778, 779, 780, 781, 782, 783, 792, 793, 794, 795, 796, 797, 798, 799, 808, 809, 810, 811, 812, 813, 814, 815, 824, 825, 826, 827, 828, 829, 830, 831, 840, 841, 842, 843, 844, 845, 846, 847, 856, 857, 858, 859, 860, 861, 862, 863, 872, 873, 874, 875, 876, 877, 878, 879, 888]
第五只小白鼠喝下水瓶标签： [16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255, 272, 273, 274, 275, 276, 277, 278, 279, 280, 281, 282, 283, 284, 285, 286, 287, 304, 305, 306, 307, 308, 309, 310, 311, 312, 313, 314, 315, 316, 317, 318, 319, 336, 337, 338, 339, 340, 341, 342, 343, 344, 345, 346, 347, 348, 349, 350, 351, 368, 369, 370, 371, 372, 373, 374, 375, 376, 377, 378, 379, 380, 381, 382, 383, 400, 401, 402, 403, 404, 405, 406, 407, 408, 409, 410, 411, 412, 413, 414, 415, 432, 433, 434, 435, 436, 437, 438, 439, 440, 441, 442, 443, 444, 445, 446, 447, 464, 465, 466, 467, 468, 469, 470, 471, 472, 473, 474, 475, 476, 477, 478, 479, 496, 497, 498, 499, 500, 501, 502, 503, 504, 505, 506, 507, 508, 509, 510, 511, 528, 529, 530, 531, 532, 533, 534, 535, 536, 537, 538, 539, 540, 541, 542, 543, 560, 561, 562, 563, 564, 565, 566, 567, 568, 569, 570, 571, 572, 573, 574, 575, 592, 593, 594, 595, 596, 597, 598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634, 635, 636, 637, 638, 639, 656, 657, 658, 659, 660, 661, 662, 663, 664, 665, 666, 667, 668, 669, 670, 671, 688, 689, 690, 691, 692, 693, 694, 695, 696, 697, 698, 699, 700, 701, 702, 703, 720, 721, 722, 723, 724, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 752, 753, 754, 755, 756, 757, 758, 759, 760, 761, 762, 763, 764, 765, 766, 767, 784, 785, 786, 787, 788, 789, 790, 791, 792, 793, 794, 795, 796, 797, 798, 799, 816, 817, 818, 819, 820, 821, 822, 823, 824, 825, 826, 827, 828, 829, 830, 831, 848, 849, 850, 851, 852, 853, 854, 855, 856, 857, 858, 859, 860, 861, 862, 863, 880, 881, 882, 883, 884, 885, 886, 887, 888]
第六只小白鼠喝下水瓶标签： [32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255, 288, 289, 290, 291, 292, 293, 294, 295, 296, 297, 298, 299, 300, 301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312, 313, 314, 315, 316, 317, 318, 319, 352, 353, 354, 355, 356, 357, 358, 359, 360, 361, 362, 363, 364, 365, 366, 367, 368, 369, 370, 371, 372, 373, 374, 375, 376, 377, 378, 379, 380, 381, 382, 383, 416, 417, 418, 419, 420, 421, 422, 423, 424, 425, 426, 427, 428, 429, 430, 431, 432, 433, 434, 435, 436, 437, 438, 439, 440, 441, 442, 443, 444, 445, 446, 447, 480, 481, 482, 483, 484, 485, 486, 487, 488, 489, 490, 491, 492, 493, 494, 495, 496, 497, 498, 499, 500, 501, 502, 503, 504, 505, 506, 507, 508, 509, 510, 511, 544, 545, 546, 547, 548, 549, 550, 551, 552, 553, 554, 555, 556, 557, 558, 559, 560, 561, 562, 563, 564, 565, 566, 567, 568, 569, 570, 571, 572, 573, 574, 575, 608, 609, 610, 611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621, 622, 623, 624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634, 635, 636, 637, 638, 639, 672, 673, 674, 675, 676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686, 687, 688, 689, 690, 691, 692, 693, 694, 695, 696, 697, 698, 699, 700, 701, 702, 703, 736, 737, 738, 739, 740, 741, 742, 743, 744, 745, 746, 747, 748, 749, 750, 751, 752, 753, 754, 755, 756, 757, 758, 759, 760, 761, 762, 763, 764, 765, 766, 767, 800, 801, 802, 803, 804, 805, 806, 807, 808, 809, 810, 811, 812, 813, 814, 815, 816, 817, 818, 819, 820, 821, 822, 823, 824, 825, 826, 827, 828, 829, 830, 831, 864, 865, 866, 867, 868, 869, 870, 871, 872, 873, 874, 875, 876, 877, 878, 879, 880, 881, 882, 883, 884, 885, 886, 887, 888]
第七只小白鼠喝下水瓶标签： [64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255, 320, 321, 322, 323, 324, 325, 326, 327, 328, 329, 330, 331, 332, 333, 334, 335, 336, 337, 338, 339, 340, 341, 342, 343, 344, 345, 346, 347, 348, 349, 350, 351, 352, 353, 354, 355, 356, 357, 358, 359, 360, 361, 362, 363, 364, 365, 366, 367, 368, 369, 370, 371, 372, 373, 374, 375, 376, 377, 378, 379, 380, 381, 382, 383, 448, 449, 450, 451, 452, 453, 454, 455, 456, 457, 458, 459, 460, 461, 462, 463, 464, 465, 466, 467, 468, 469, 470, 471, 472, 473, 474, 475, 476, 477, 478, 479, 480, 481, 482, 483, 484, 485, 486, 487, 488, 489, 490, 491, 492, 493, 494, 495, 496, 497, 498, 499, 500, 501, 502, 503, 504, 505, 506, 507, 508, 509, 510, 511, 576, 577, 578, 579, 580, 581, 582, 583, 584, 585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595, 596, 597, 598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608, 609, 610, 611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621, 622, 623, 624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634, 635, 636, 637, 638, 639, 704, 705, 706, 707, 708, 709, 710, 711, 712, 713, 714, 715, 716, 717, 718, 719, 720, 721, 722, 723, 724, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736, 737, 738, 739, 740, 741, 742, 743, 744, 745, 746, 747, 748, 749, 750, 751, 752, 753, 754, 755, 756, 757, 758, 759, 760, 761, 762, 763, 764, 765, 766, 767, 832, 833, 834, 835, 836, 837, 838, 839, 840, 841, 842, 843, 844, 845, 846, 847, 848, 849, 850, 851, 852, 853, 854, 855, 856, 857, 858, 859, 860, 861, 862, 863, 864, 865, 866, 867, 868, 869, 870, 871, 872, 873, 874, 875, 876, 877, 878, 879, 880, 881, 882, 883, 884, 885, 886, 887, 888]
第八只小白鼠喝下水瓶标签： [128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255, 384, 385, 386, 387, 388, 389, 390, 391, 392, 393, 394, 395, 396, 397, 398, 399, 400, 401, 402, 403, 404, 405, 406, 407, 408, 409, 410, 411, 412, 413, 414, 415, 416, 417, 418, 419, 420, 421, 422, 423, 424, 425, 426, 427, 428, 429, 430, 431, 432, 433, 434, 435, 436, 437, 438, 439, 440, 441, 442, 443, 444, 445, 446, 447, 448, 449, 450, 451, 452, 453, 454, 455, 456, 457, 458, 459, 460, 461, 462, 463, 464, 465, 466, 467, 468, 469, 470, 471, 472, 473, 474, 475, 476, 477, 478, 479, 480, 481, 482, 483, 484, 485, 486, 487, 488, 489, 490, 491, 492, 493, 494, 495, 496, 497, 498, 499, 500, 501, 502, 503, 504, 505, 506, 507, 508, 509, 510, 511, 640, 641, 642, 643, 644, 645, 646, 647, 648, 649, 650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660, 661, 662, 663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673, 674, 675, 676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686, 687, 688, 689, 690, 691, 692, 693, 694, 695, 696, 697, 698, 699, 700, 701, 702, 703, 704, 705, 706, 707, 708, 709, 710, 711, 712, 713, 714, 715, 716, 717, 718, 719, 720, 721, 722, 723, 724, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736, 737, 738, 739, 740, 741, 742, 743, 744, 745, 746, 747, 748, 749, 750, 751, 752, 753, 754, 755, 756, 757, 758, 759, 760, 761, 762, 763, 764, 765, 766, 767]
第九只小白鼠喝下水瓶标签： [256, 257, 258, 259, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 280, 281, 282, 283, 284, 285, 286, 287, 288, 289, 290, 291, 292, 293, 294, 295, 296, 297, 298, 299, 300, 301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312, 313, 314, 315, 316, 317, 318, 319, 320, 321, 322, 323, 324, 325, 326, 327, 328, 329, 330, 331, 332, 333, 334, 335, 336, 337, 338, 339, 340, 341, 342, 343, 344, 345, 346, 347, 348, 349, 350, 351, 352, 353, 354, 355, 356, 357, 358, 359, 360, 361, 362, 363, 364, 365, 366, 367, 368, 369, 370, 371, 372, 373, 374, 375, 376, 377, 378, 379, 380, 381, 382, 383, 384, 385, 386, 387, 388, 389, 390, 391, 392, 393, 394, 395, 396, 397, 398, 399, 400, 401, 402, 403, 404, 405, 406, 407, 408, 409, 410, 411, 412, 413, 414, 415, 416, 417, 418, 419, 420, 421, 422, 423, 424, 425, 426, 427, 428, 429, 430, 431, 432, 433, 434, 435, 436, 437, 438, 439, 440, 441, 442, 443, 444, 445, 446, 447, 448, 449, 450, 451, 452, 453, 454, 455, 456, 457, 458, 459, 460, 461, 462, 463, 464, 465, 466, 467, 468, 469, 470, 471, 472, 473, 474, 475, 476, 477, 478, 479, 480, 481, 482, 483, 484, 485, 486, 487, 488, 489, 490, 491, 492, 493, 494, 495, 496, 497, 498, 499, 500, 501, 502, 503, 504, 505, 506, 507, 508, 509, 510, 511, 768, 769, 770, 771, 772, 773, 774, 775, 776, 777, 778, 779, 780, 781, 782, 783, 784, 785, 786, 787, 788, 789, 790, 791, 792, 793, 794, 795, 796, 797, 798, 799, 800, 801, 802, 803, 804, 805, 806, 807, 808, 809, 810, 811, 812, 813, 814, 815, 816, 817, 818, 819, 820, 821, 822, 823, 824, 825, 826, 827, 828, 829, 830, 831, 832, 833, 834, 835, 836, 837, 838, 839, 840, 841, 842, 843, 844, 845, 846, 847, 848, 849, 850, 851, 852, 853, 854, 855, 856, 857, 858, 859, 860, 861, 862, 863, 864, 865, 866, 867, 868, 869, 870, 871, 872, 873, 874, 875, 876, 877, 878, 879, 880, 881, 882, 883, 884, 885, 886, 887, 888]
第十只小白鼠喝下水瓶标签： [512, 513, 514, 515, 516, 517, 518, 519, 520, 521, 522, 523, 524, 525, 526, 527, 528, 529, 530, 531, 532, 533, 534, 535, 536, 537, 538, 539, 540, 541, 542, 543, 544, 545, 546, 547, 548, 549, 550, 551, 552, 553, 554, 555, 556, 557, 558, 559, 560, 561, 562, 563, 564, 565, 566, 567, 568, 569, 570, 571, 572, 573, 574, 575, 576, 577, 578, 579, 580, 581, 582, 583, 584, 585, 586, 587, 588, 589, 590, 591, 592, 593, 594, 595, 596, 597, 598, 599, 600, 601, 602, 603, 604, 605, 606, 607, 608, 609, 610, 611, 612, 613, 614, 615, 616, 617, 618, 619, 620, 621, 622, 623, 624, 625, 626, 627, 628, 629, 630, 631, 632, 633, 634, 635, 636, 637, 638, 639, 640, 641, 642, 643, 644, 645, 646, 647, 648, 649, 650, 651, 652, 653, 654, 655, 656, 657, 658, 659, 660, 661, 662, 663, 664, 665, 666, 667, 668, 669, 670, 671, 672, 673, 674, 675, 676, 677, 678, 679, 680, 681, 682, 683, 684, 685, 686, 687, 688, 689, 690, 691, 692, 693, 694, 695, 696, 697, 698, 699, 700, 701, 702, 703, 704, 705, 706, 707, 708, 709, 710, 711, 712, 713, 714, 715, 716, 717, 718, 719, 720, 721, 722, 723, 724, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736, 737, 738, 739, 740, 741, 742, 743, 744, 745, 746, 747, 748, 749, 750, 751, 752, 753, 754, 755, 756, 757, 758, 759, 760, 761, 762, 763, 764, 765, 766, 767, 768, 769, 770, 771, 772, 773, 774, 775, 776, 777, 778, 779, 780, 781, 782, 783, 784, 785, 786, 787, 788, 789, 790, 791, 792, 793, 794, 795, 796, 797, 798, 799, 800, 801, 802, 803, 804, 805, 806, 807, 808, 809, 810, 811, 812, 813, 814, 815, 816, 817, 818, 819, 820, 821, 822, 823, 824, 825, 826, 827, 828, 829, 830, 831, 832, 833, 834, 835, 836, 837, 838, 839, 840, 841, 842, 843, 844, 845, 846, 847, 848, 849, 850, 851, 852, 853, 854, 855, 856, 857, 858, 859, 860, 861, 862, 863, 864, 865, 866, 867, 868, 869, 870, 871, 872, 873, 874, 875, 876, 877, 878, 879, 880, 881, 882, 883, 884, 885, 886, 887, 888]
如果第一只，第三只，第五只小白鼠死了，就是0b0000010101（二进制数，转化为十进制数是21），第21瓶水有毒。

3.有24颗外观完全一样的小球，其中有一个是空心的，现在只有一个天平，最少称几次能找出这个特殊的球？
第一次：天平左右盘分别放12颗取出12颗
第二次：天平左右盘方12颗再取出6颗观测天平是否失衡没有变化的话进进行第三次
第三次：天平左右盘分别方6颗取出3颗观测天平是否失衡没有变化的话进进行第四次
第四次：天平左右盘分别放取出的3颗中1颗若平衡剩余一颗为假的若不平衡升高的一颗为假的

取平均值最多四次