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问题 单项选择题

氟利昂制冷剂工作正常时由蒸发器进口至出口是由（）变成（）。

A．饱和液体/饱和蒸气

B．湿蒸气/饱和蒸气

C．湿蒸气/过热蒸气

D．过冷液体/过热蒸气

答案

参考答案：C

单项选择题

拉深系数是指拉深后材料的断面积与拉深之前的（）比。

A.体积

B.质量

C.断面积
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单项选择题

Originally introduced by Netscape Communications, (56) are a general mechanism which HTTP Server side applications, such as CGI (57) , can use to both store and retrieve information on the HTTP (58) side of the connection. Basically, Cookies can be used to compensate for the (59) nature of HTTP. The addition of a simple, persistent, client-side state significantly extends the capabilities of WWW-based (60) .

（58）是（）

A.Client

B.Editor

C.Creator

D.Server
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