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【单选题】
一些海岛国家,如英国、日本,也常用以表示对外贸易的是( )A.
国际贸易
B.
对外贸易
C.
海外贸易
D.
转口贸易
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举一反三
【单选题】The process of pupils learning to write is just like reading in that______.
A.
pupils allow another person to think for themselves while writing
B.
pupils learn how to write with the help of their teachers
C.
pupils should avoid being affected by their teacher's thoughts
D.
pupils write too much to reflect about their own wprks
【单选题】تەبىئەت 这个词音节的正确划分是 ( )
A.
تەبىئەت = تە+ﺑـىـ +ﯭت
B.
تەبىئەت = ت+ەﺑـىـ +ﯭت
C.
تەبىئەت = تەﺑـ+ىـ +ﯭت
D.
تەبىئەت = تە+ﺑـىـﯭ +ت
【单选题】What is WAN?
A.
World alone Network
B.
World area network
C.
Wide area network
D.
Wise area network
E.
Sorry I dont know
【单选题】What is the correct order if you wan to describ an event?
A.
①What was the event? ②When and where was it? ③Why did you go there? ④ Details of the event. ⑤What did you think of it?
B.
①What did you think of it?②When and where was it? ③Why did you go there? ④Details of the event. ⑤What was the event?
C.
①Details of the event.②When and where was it? ③Why did you go there? ④What was the event? ⑤What did you think of it?
D.
①Why did you go there? ②When and where was it? ③Details of the event. ④What was the event? ⑤What did you think of it?
【判断题】已知: u 1 =(10 cos w t +5 cos 3 w t )V , u 2 =[10 cos w t +5 cos (3 w t + p )]V ,这两个非正弦电压的基波分量与三次谐波分量的振幅分别相等,因此, u 1 与 u 2 的有效值相等,二者的峰值也相等。
A.
正确
B.
错误
【单选题】已知两正弦电压: u 1 =10cos ( 100t+45 0 ) V , u 2 =2sin ( 100t+45 0 ) V ,则 u 1 与 u 2 的相位差为( )。
A.
0 0
B.
90 0
C.
180 0
D.
- 90 0
【单选题】What is A WAN?（）
A.
A network that is restricted.to A single building ,A group of buildings, or even A single room.
B.
A network that encompasses an entire city or metropolitanared and connects multiple LANs.
C.
A network that connects client devices wirelessly using radio waves.
D.
A network that crosses metropolitan, regional, or national boundaries.
【单选题】What is A WAN？（）
A.
A network that connects client devices wirelessly using radio waves
B.
A network that crosses metropolitan, regional, or national boundaries
C.
A network that is restricted.to a single building ,a group of buildings, or even a single room
D.
A network that encompasses an entire city or metropolitanared. and. connects multiple LANs
【单选题】What is David going to do?
A.
He wants to talk with his neighbors about the problem.
B.
He wants to move.
C.
He is going to go to bed late.
【单选题】Click the Exhibit button. In the exhibit, if the link we are measuring is 1.5 Mbps, what is the effective WAN bandwidth?（）
A.
0.947 Mbps
B.
3.000 Mbps
C.
4.065 Mbps
D.
282.058 Mbps
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