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问题 选择题

Who saw it ______ at that time?

[ ] 

A. happen

B. happened

C. happens

D. to happen

答案

答案：A

选择题

________different kinds of pianos, the factory is sure they can satisfy people's needs . [ ]

A. To produce  

B. Being produced

C. Produced  

D. Having produced
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单项选择题 A2型题

患者男性，24岁，发热3天后出现腰痛，尿量明显减少。超声特征：双侧肾脏明显增大，肾实质增厚，回声增高，肾锥体肿大，回声极低，肾窦受压面积缩小。本病可诊断为（）。

A.肾脓肿

B.急性肾衰竭

C.慢性肾衰竭

D.肾结核

E.肾血肿
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