與多模光纖相比較，單模光纖具有　 ( )　 等特點
A、較高的傳輸率、較長的傳輸距離、較高的成本
B、較低的傳輸率、較短的傳輸距離、較高的成本
C、較高的傳輸率、較短的傳輸距離、較低的成本
D、較低的傳輸率、較長的傳輸距離、較低的成本

CDMA系統(tǒng)中使用的多路復用技術是 (1) 。我國自行研制的移動通信3G標準是(2)。
（1）A、時分多路
B、波分多路
C、碼分多址
D、空分多址
（2）A、TD-SCDMA
B、WCDVA
C、CDVh2000
D、GPRS

某校園網(wǎng)用戶無法訪問外部站點210.102.58.74，管理人員可以在Windows環(huán)境下使用 ( ) 判斷故障發(fā)生在校園網(wǎng)內還是校園網(wǎng)外。
A、ping 210.102.58.74
B、tracert 210.102.58.74
C、netstat 210.102.58.74
D、arp 210.102.58.74

Originally introduced by Netscape Communications, (1) are a general mechanism which HTTP Server side applications, such as CGI (2 ), can use to both store and retrieve information on the HTTP (3) side of the connection. Basically, Cookies can be used to compensate for the (4 ) nature of HTTP. The addition of a simple, persistent, client-side state significantly extends the capabilities of WWW-based （5）.
（1）A、Browsers 
B、Cookies 
C、Connections 
D、Scripts
（2）A、graphics 
B、processes 
C、scripts 
D、texts
（3）A、Client 
B、Editor 
C、Creator 
D、Server
（4）A、fixed 
B、flexible 
C、stable 
D、stateless
（5）A、programs 
B、applications 
C、frameworks 
D、constrains 

 WebSQL is a SQL-like ( 1 ) language for extracting information from the web. Its capabilities for performing navigation of web ( 2 ) make it a useful tool for automating several web-related tasks that require the systematic processing of either ail the links in a (3), all the pages that can be reached from a given URL through (4) that match a ' pattern, or a combination of both. WebSQL also provides transparent access to index servers that can be queried via the Common (5) Interface.
（1）A、query 
B、transaction 
C、communication 
D、programming
（2）A、browsers 
B、servers 
C、hypertexts 
D、clients
（3）A、hypertext 
B、page 
C、protocol 
D、operation
（4）A、paths 
B、chips 
C、tools 
D、directories
（5）A、Router 
B、Device 
C、Computer 
D、Gateway