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【单选题】
在系统光发射机的调制器前附加一个扰码器的作用是()
A.
保证传输的透明度
B.
控制长串“1和”“0的出现”
C.
进行在线无码监测
D.
解决基线漂移
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参考答案:
举一反三
【简答题】0502P149 ★★盘点的主要内容?
【单选题】Energy will be one of the defining issues of this century. One thing is clear: the era of easy oil is over. What we all do next will (1)_____ how well we meet the energy needs of the entire world in t...
A.
decline
B.
determine
C.
declaim
D.
decide
【单选题】在模拟用户电路七大功能中,R指的是
A.
馈电
B.
过压保护
C.
振铃
D.
编译码
【单选题】Energy will be one of the defining issues of this century. One thing is clear: the era of (1)_____ oil is over. What we all do next will determine how well we meet the energy needs of the entire world...
A.
fossil
B.
eternal
C.
easy
D.
formidable
【单选题】Decide whether the following sentence contain a Defining or Non- defining relative clause. He is the one that I would choose.
A.
Defining relative clause
B.
Non- defining relative clause
【简答题】直流电流用字母()表示,交流电流用字母()表示
【单选题】传感器是能感受规定的被测量并按照一定规律转换成( )的器件或装置。
A.
输入变量
B.
可用输出信号
C.
便于利用的化学信号
D.
脉冲
【单选题】在模拟用户电路七大功能中,R指的是
A.
A馈电
B.
B过压保护
C.
C振铃
D.
D编译码
【单选题】Energy will be one of the defining issues of this century. One thing is clear: the era of (1)_____ Oil is over. What we all do next will determine how well we meet the energy needs of the entire world...
A.
fossil
B.
eternal
C.
easy
D.
formidable
【简答题】直流电用字母()表示
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