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【单选题】
将物理信道按时间分割成若干个时间片轮换给多个信号使用,每一时片由复用的一个信号占用,这样可在一条物理信道上传输多个数字信号,这种复用技术叫( )。A.
空分多路复用
B.
同步时分多路复用
C.
频分多路复用
D.
时分多路复用
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【单选题】--- Excuse me. Is there a post office in the neighborhood? --- Yes, there’s ________ on Bridge Street. It’s not far from here.
A.
it
B.
one
C.
that
【单选题】According to the IMF, one of the reasons of the slower economic growth is______.
A.
government cost-cutting measures in developing countries
B.
the debt crisis in developing countries
C.
continuing decline in international demand
D.
the worse economic decline in Europe
【单选题】Lord Lothian said most of the ancient houses were ______.
A.
to be protected by the government
B.
decaying through lack of money for their repair
C.
kept in good condition for the time being
D.
doomed to decay without good preservation
【单选题】If the opinion polls are to be believed, most Americans are coming to trust their government more than they used to. The habit has not yet spread widely among American Indians, who suspect an organiza...
A.
expressed their gratitude for their lawyers.
B.
won a victory by use of legal weapons.
C.
have lost confidence in their government.
D.
came to believe the public opinion polls.
【简答题】石油沥青的组成主要有 __________、__________和__________。
【简答题】The protection of (A)our environment is (B) not nothing (C) to be left to the government. Everyone should be concerned (D).
【单选题】To protect Chinese retailers against the growing foreign competition, the Chinese government still takes measures to limit the numbers of stores opened by foreign retailers in large cities.
A.
Y
B.
N
C.
NG
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