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问题 单项选择题

稽留流产

A．易引起DIC
B．易引起失血性休克
C．易引起癎腔粘连
D．易引起人流综合征
E．易引起子宫穿孔

答案

参考答案：A

解析：哺乳期、妊娠期子宫柔软，施行人工流产时容易致子宫穿孔。人流综合征指受术者在术中生理心动过缓、心律失常、血压下降、面色苍白、出汗甚至昏厥和抽搐；主要由子宫颈和子宫遭受刺激引起迷走神经反射所致，并与精神紧张有关。稽留流产如果稽留时间过长，可能发生凝血功能障碍，导致DIC。

填空题

Today’s lecture is about the mass (1) of the world’s population. There are two major (2) why people are moving to cities. The first reason is (3) . People are moving to the cities because that’s where they can find (4) and earn money. The second reason for the move to cities has to do with (5) of life issues: comfort and (6) . Cities often offer better (7) . And then for many, city life is just more (8) . An interesting consequence of urbanization is that the average (9) of people in the countryside is increasing, while that of the cities is (10) .
Three key (11) can be identified in our cities. First of all, they’re getting bigger. Most cities are bigger now than ever before. Cities are also changing shape. They’re getting (12) , because land is getting more and more expensive. (13) have become a symbol of modern cities.
Cities are also changing shape in other ways. The (14) Model and the (15) Nuclei Model are probably more typical of the cities we know today. They show the urban (16) that’s occurring in contemporary cities.
The third change is that our cities are breaking up into (17) communities, often by (18) group or (19) level. This often means that people stay within their community and do not come into contact with others from different (20) .
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单项选择题

雷诺现象的皮肤颜色变化顺序为（）

A.红→白→紫

B.紫→红→白

C.紫→白→红

D.红→紫→自

E.白→紫→红
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