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问题 多项选择题

下面哪几项是描述产品成熟期特点的（）

A.销售额增长放慢

B.产品销售额和利润额增长缓慢

C.利润为负数

D.利润增长停滞

E.销售额快速递减

答案

参考答案：A, D

选择题

－What do you think we can do for our aged parents?

－You_______ do anything except to be with them and be yourself. [ ]

A. don't have to

B. oughtn't to

C. mustn't

D. can't

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单项选择题

若H未入选，下列除了哪一个外都可以入选( )

A．P

B．Q

C．R

D．T
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