A、B、C为三种短周期元素，A、B同周期，A、C的最低价离子分别为A^2-、C^-，B²⁺与C^-具有相同的电子层结构，下列叙述一定不正确的是（　　）

A．离子半径A^2-＞C^-＞B²⁺

B．它们的原子序数A＞B＞C

C．它们的原子半径C＞B＞A

D．原子最外层上的电子数C＞A＞B

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