问题
单项选择题 A1/A2型题
机械性肠梗阻的病因为（）
A.慢性铅中毒
B.肠功能紊乱致肠痉挛
C.肠管受压
D.肠系膜血管栓塞
E.腹膜后血肿或感染
答案
参考答案：C
解析：机械性肠梗阻是由于肠腔堵塞、肠管受压或肠壁病变导致的肠内容物正常运行或通过发生障碍。
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机械性肠梗阻的病因为（）
A.慢性铅中毒
B.肠功能紊乱致肠痉挛
C.肠管受压
D.肠系膜血管栓塞
E.腹膜后血肿或感染
参考答案：C
解析：机械性肠梗阻是由于肠腔堵塞、肠管受压或肠壁病变导致的肠内容物正常运行或通过发生障碍。
| 从方框中选择恰当的单词，并用其正确形式填空（每词只能选用一次）。 | |
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| 1. There is an eletric (电动的) _______ in the kitchen. 2. It’s good to _______ deeply when you feel nervous. 3. My bike is broken and I’m going to ask Grandpa Wang to _______ it. 4. Some kinds of _______ are caused by things people do - for example, smoking. 5. Why do people get a _______ when touching electric points with wet hands? 6. When she fell down, h  er head was _______ h ard on the floor. |