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【单选题】
关于静电场下列说法中正确的是
A.
静电场是由任意电荷所激发的电场
B.
静电场是一种有源场
C.
静电场是一种无源场
D.
静电场必须由点电荷激发形成
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【单选题】Internet 远程登录的协议是( ),它允许用户首先在一台联网的计算机上登录到一个远程分时系统中,然后像使用自己的计算机一样使用该远程系统。
A.
ftp
B.
www
C.
telnet
D.
ping
【单选题】目前,中国对世界经济增长贡献率超过( )
A.
10%
B.
20%
C.
30%
D.
40%
【单选题】目前中国对世界经济增长贡献率超过( )。
A.
0.2
B.
0.065
C.
0.4
D.
0.3
【单选题】目前中国经济对世界经济的增长贡献率超过()%
A.
30
B.
40
C.
50
D.
20
【简答题】阅读理解 Jim is an English boy. He comes to China with his father and mother. They come here to work Jim comes here to study. He is in No. 5 Middle School. He gets up early everyday. He isn't late for sch...
【简答题】Time is very important in our lives. It organizes our everyday moments. However, time never had any importance in my life until I received a watch from my father. I received this gift on a cloudy day....
【判断题】Telnet允许用户在一台联网的计算机上登录到一个远程分时系统中,然后像使用自己的计算机一样使用该远程系统。
A.
正确
B.
错误
【简答题】Time is very important in our life. It our everyday moments. However, time never had any importance in my life until I a watch from my father, which organized my life and made me more responsible. It'...
【单选题】目前中国对世界经济增长贡献率超过( )。
A.
20%
B.
6.5%
C.
40%
D.
30%
【单选题】目前,我国经济保持中高速增长,综合国力和国际影响力显著提升,经济总量稳居世界第二位,对世界经济增长贡献率超过( )。
A.
20%
B.
30%
C.
40%
D.
50%
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