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【多选题】
控制系统中,连接各环节间的信号有( )。A.
模拟量
B.
数字量
C.
符号量
D.
逻辑量
E.
信号量
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反馈参考答案：
举一反三
【多选题】Mark Twain had led an active life in the very center of the American experience. He had been a____________ .
A.
printer, pilot, soldier
B.
silver-minor, gold-washer
C.
lecturer, traveler, businessman
D.
novelist, autobiographer
【简答题】链传动的类型为传动链传动、（）、牵引链传动。
【单选题】Few people believed the dam had been burst because there had been too many false alarms.
A.
Y
B.
N
C.
NG
【简答题】链传动的类型为（）链传动、（）链传动、（）链传动。
【单选题】Fewer people would have died if______.
A.
more announcements had been made
B.
people hadn't used the lifts
C.
the people had obeyed the office
D.
the incident had happened on a weekend
【简答题】链传动的类型为传动链传动、起重链传动、（）。
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