题目内容

用例图的要素包括参与者、用例和时间。

A. 正确
B. 错误

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用例描述用户对系统的期望，被用于软件需求建模，一个用例对应于软件能够为参与者提供的一项服务。

A. 正确
B. 错误

Whether he comes or not ________ matter too much.

A. doesn’t
B. don’t
C. didn’t
D. haven’t

“News of victories ________ pouring in as our army advances,” the company commander said.

A. keep
B. keeps
C. kept
D. have kept

Ten minutes ________ an hour when one is waiting for a phone call.

A. is
B. are
C. is like
D. seems