镇静钢钢锭的凝固结构可分为三个结晶区域,分别为()、()和()。
参考答案:激冷区;柱状晶区;中心等轴晶区
抛物线y=-2(x+1)2+3关于直线y=1作轴对称变换后的解析式为______.
Originally introduced by Netscape Communications, (21) are a general mechanism which HTTP Server side applications, such as CGI (22) , can use to both store and retrieve information on the HTTP (23) side of the connection. Basically, Cookies can be used to compensate for the (24) nature of HTTR The addition of a simple, persistent, client-side state significantly extends the capabilities of WWW-based (25) .
A.Client
B.Editor
C.Creator
D.Server