冷变形对金属材料性能的影响包括（）。
A.金属密度变大
B.导电性和导热性下降
C.磁性改变
D.化学稳定性降低
参考答案：B, C, D
甲数除以乙数的商是1.5，如果甲数增加20，则甲数是乙数的2倍．原来甲数是______．
Originally introduced by Netscape Communications, (66) are a general mechanism which HTTP Server side applications, such as CGI (67) , can use to both store and retrieve information on the HTTP (68) side of the connection. Basically, Cookies can be used to compensate for the (69) nature of HTTE The addition of a simple, persistent, client-side state significantly extends the capabilities of WWW-based (70) .
A. graphics B. processes C. scriptsD. texts
