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问题 填空题

如果a×3=b×5，那么a：b=______：______；如果a：4=0.2：7，那么a=______．

答案

（1）因为：a×3是外项，b×5就是内项，

所以：a：b=5：3；

（2）a：4=0.2：7，

7a=0.2×4

7a÷7=0.2×4÷7

a=

4
35
；

故答案为：5，3；

4
35
．

多项选择题

核电开发主要制约因素包括（）。

A.选址

B.环境安全

C.核燃料供应
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单项选择题

The primary advantages of a Client/Server system arise from splitting the processing between the client system and the database server. Since the bulk of the database processing is done on the back-end, the speed of the DBMS isn’t tied to the speed of the (31) .

The major disadvantage of Client/Server system is the increased cost of (32) and support personnel who maintain the database server. There is also the issue of (33) with so many parts comprising the entire C/S system; Murphy’s Law can kick in-the more pieces that compose the system, the more pieces that can fail. It’s also harder to track down problems when the system (34) . And it can initially take longer to get all the components set up and working together. All this is compounded by the general lack of experience and expertise of potential support personnel and programmers, due to the relative newness of the technology. As C/S system become more common, this problem should abate.

Therefore the C/S system is more (35) .

（34）是（）

A.burns

B.crashes

C.runs

D.uses
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