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问题 单项选择题

与线性表相比，串的插入和删除操作的特点是（）。

A.通常以串整体作为操作对象

B.需要更多的辅助空间

C.算法的时间复杂度较高

D.涉及移动的元素更多

答案

参考答案：A

选择题

--Hey, Mary, you are wanted on the phone.

---________I’m coming.

A．So what?

B．Hang on a minute.

C．That’s a good point.

D．What a shame！
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选择题

— Look!The light is still on in Mr Zhang's office.

— I'm afraid he _____ his work yet. [ ]

A. doesn't finish

B. didn't finish

C. hasn't finished

D. won't finish

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