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【判断题】
数字式电压表可以用来测量变频器输出电压。A.
正确
B.
错误
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举一反三
【简答题】小题1:According to the key points, what’s the searching area for the missing plane? A．In the southern India Ocean. B．In the water area around Australia. C．In the water area in the southern pacific ocean...
【单选题】What’s mean of “Approach” signal aspects ?
A.
tell the train to proceed
B.
tell engineers to move at restricted speed.
C.
tell engineers stop immediately .
D.
tell engineers to reduce its speed to 35miles per hour and prepare to stop at the next signal.
【单选题】What’s mean of “restricting” signal aspects ?
A.
indicates that the train may proceed at restricted speed.
B.
indicates that the train may proceed.
C.
indicates that the train stop immediately .
D.
indicates that the train should reduce its speed to 35miles per hour and prepare to stop at the next signal.
【简答题】听力。 1. What’s the probable relationship between the speakers? A. Doctor and patient. B. Operator and caller. C. Customer and repairman. 2. How many cities has the man traveled to according to the conv...
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