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问题 单项选择题

羊水栓塞的主要病理诊断根据是（）

A.肺小动脉和毛细血管内有羊水的成分

B.微循环内透明血栓

C.肺出血性梗死

D.肺泡腔内有角化上皮、胎便小体

E.肺内透明膜形成

答案

参考答案：A

解析：羊水栓塞的证据是在显微镜下观察到肺小动脉和毛细血管内有羊水的成分，包括角化鳞状上皮、胎毛、胎脂、胎粪和黏液。亦可在母体血液涂片中找到羊水的成分。

单项选择题

In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.

How does the developer of a large database system achieve (1) and data independence How does the developer make certain that stored items are (2) and do not simply disappear in the immensities of the database, as if in quicksand

One solution is to set up a (3) system, in which all data (the internal level), all records and files (the conceptual level), and all user interfaces (the external level) are controlled by one central programming group. This may seem the most useful solution. But worldwide enterprises such as the meteorological and satellite tracking networks, IBM, and General Motors gather and record information at a very large number of locations. To stay flexible and avoid top - heaviness, such an organization might want to avoid excessive centralization.

A centralized system is (4) , but it may not be responsive to user needs. This is particularly true in a large organization - the worldwide meteorological network, for example, Data-gathering methods in the Himalayas, the equatorial jungles are different in very possible way. It is reasonable to believe that the best choices for the corresponding data storage and access structures ought to be just as different. A centralized database system would not (5) such differences.

3（）

A．database

B．distributed

C．information

D．centralize
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单项选择题

项目评价中，流动资产一般不考虑______。

A．应收账款
B．应付账款
C．存货
D．现金
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