试题与答案

At the present time, more singing stars_

题型:选择题

题目:

At the present time, more singing stars_______ to be difficult to work with.

A.say

B.have said

C.are said

D.were said

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C解析:Dietl危象在上述疾病中只见于肾下垂。肾下垂时肾脏血管受到牵拉,刺激交感神经引起一系列症状,如肾绞痛、恶心、呕吐、苍白、冷汗和虚脱等。

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