题目内容

9. ___________ should not become a serious disadvantage in life and work.

A. To be not tall
B. Not being tall
C. Being not tall
D. Not to be tall

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10. Sandy could do nothing but ____________ to his teacher that he was wrong.

A. admit
B. admitted
C. admitting
D. to admit

进行需求分析可使用多种工具，但（）是不适用的的。

A. 层次方框图
B. PAD图
C. 状态转换图
D. IPP图

7. I don't remember __________ a chance to try this method.

A. to have been given
B. to be given
C. giving
D. having been given

函数f(x,y)在有界闭区域D上的二重积分存在的必要条件是f(x,y)在D上连续。

A. 对
B. 错