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问题 选择题

如图所示，赛车尾部气流偏导器的主要作用是让汽车在高速行驶时，对地面的压力更大，提高车轮的抓地性能。图中能表示偏导器横截面积形状的是

[ ]

A.

B.

C.

D.

答案

答案：B

问答题 简答题

腰背痛概述
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单项选择题

Originally introduced by Netscape Communications, (48) are a general mechanism which HTTP Server side applications, such as CGI (49) , can use to both store and retrieve information on the HTTP (50) side of the connection. Basically, Cookies can be used to compensate for the (51) nature of HTTE The addition of a simple, persistent, client-side state significantly extends the capabilities of WWW-based (52) .

50（）

A.Client 

B.Editor 

C.Creator 

D.Server
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