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【判断题】
SDH系统的光线路码型采用加扰的NRZ码，采用扰码器是为了防止信号在传输中出现长连“0”或长连“1”，免于接收机出现错误判断误码现象。A.
正确
B.
错误
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举一反三
【多选题】Which statements are true to the Scrapper according to the speech?
A.
they graduated from State School
B.
they have great recommendation
C.
they have fair amount of job hopping
D.
they have quite a lot of odd jobs
【单选题】Which statement is true according to the speech?
A.
Good education is very important for future of the students.
B.
Good education plays a great role on the development of the society.
C.
Good education matters to both the individuals and the society.
D.
Good education is important to find an ideal job.
【多选题】Which statements are true to the Silver Spoon according to the speech?
A.
they graduated from Ivy League
B.
they have flawless resumes
C.
they have great recommendation
D.
they have fair amount of jobs
【简答题】说出常用联轴器的种类及特点。
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