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【单选题】
电机系统上电顺序要求如下:在给电机控制器上高压电源之前,必须先将( )控制电源接通。A.
高压
B.
中压
C.
低压
D.
稳压
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【单选题】( ) They had hardly started to work ____ the trouble began.
A.
as
B.
when
C.
than
D.
while
【简答题】请将下面的句子改成倒装句 They had hardly heard the news when they rushed out into the street.
【简答题】A. Fill in each blank with a proper temporal conjunctive (用 时间连词填空,如:just as、when、before、after、while、as soon as、since、once、soon after、until等 ) 。 They had hardly started to work the trouble began.
【单选题】The two men had hardly had time to ________what had happened when they were thrown violently into the sea.
A.
recognize
B.
realize
C.
understand
D.
grasp
【简答题】B. Fill in each blank with a proper temporal conjunction ( 用时间连词填空 ) 。 After Once when until soon after 1. They kept on working it because completely dark. 2. They had hardly started to work the ...
【单选题】Hardly ______ when the door suddenly closed.
A.
they had arrived
B.
they arrived
C.
did they arrive
D.
had they arrived
【单选题】If they had worked hardly, they die project ahead of time.
A.
will finish
B.
would have finished
C.
have finished
D.
had finished
【简答题】They had hardly walked 300 yards when they heard the gunfire. → Hardly ______ 300 yards when they heard the gunfire.
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