一个容量为n的样本,分成若干组,已知某数的频数和频率分别为40、0.125,则n的值为 [ ]
A.640
B.320
C.240
D.160
答案:B
---Would you like to join us in basketball?
---_______ but I have to study for my science test.[ ]
A.I wouldn't
B.I'd love to
C.I'd like
D.I don't like it
阅读下列流程图:
当用判定覆盖法进行测试时,至少需要设计()个测试用例。
A.2
B.4
C.6
D.8