由于器质性病变致肠腔变小，使肠内容物通过发生障碍，称为（）

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问题单项选择题 B1型题

A．动力性肠梗阻

B．血运性肠梗阻

C．机械性肠梗阻

D．不完全性肠梗阻

E．绞窄性肠梗阻

答案

参考答案：C

单项选择题 A1型题

为感染性心内膜炎患者做血培养时，应抽取的静脉血量至少是（）

A.6ml

B.10ml

C.2ml

D.8ml

E.4ml

句型转换

句型转换。

1. They were studying in the room at that time. (就画线部分提问)

_________ _________ they _________ in the room at that time?

2. He was away from school because he helped his father at home. (就画线部分提问)

_________ _________he away from school?