TD-SCDMA系统中采用了智能天线技术，每小区所使用的智能天线有多个通道，只有满足各个通道的（）特性等一致，才能保障智能天线波束的赋形的效果。

A、幅度、相位

B、功率

C、低噪

TD一SCDMA系统是一个自干扰系统，干扰主要有（）.

A、ISI符号间干扰

B、MAI多址干扰

C、令区区干扰

D、白噪声

某单位的统计报表比较多，采用表号（报表的编号）的好处是（20）。

（20）

A.比较直观

B.可以代替表名

C.便于分类归档

D.可以代替标题

When creating a list of vendors， which of the following information should be included？（）

A、Vendor customer satisfaction ratings

B、OEM contact information

C、Time vendor has been in business

D、Annual spending budget with the vendor

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 HTTP. The addition of a simple, persistent, client-side state significantly extends the capabilities of WWW-based ___(70)___ .

(66)A. Browsers B. Cookies C. Connections D. Scripts

(67)A. graphics B. processes C. scripts D. texts

(68)A. Client B. Editor C. Creator D. Server

(69)A. fixed B. flexible C. stable D. stateless

(70)A. programs B. applications C. frameworks D. constrains

3G的标准共有几个？