【单选题】【消耗次数：1】
在印制电路板等部件或整机安装完毕进行调试前，必须在______情况下，进行认真细致的检查，以便发现和纠正安装错误，避免盲目通电可能造成的电路损坏。
①
通电
②
不通电
③
任意
④
一会开一会关
参考答案：
复制
纠错
相关题目
随机题目
【单选题】
Televisions enable us to see things happen almost at the exact moment _____.
①
which they are happening
②
they are happening
③
which they happen
④
they have happened
【单选题】
To their credit the Department of Energy _____these ideas and funded a detailed study.
①
took over
②
took on
③
took up
④
took to
【单选题】
Once our chickens started laying eggs, we had such a _____of eggs that we were giving many away to our neighbors.
①
output
②
surplus
③
production
④
plenty
【单选题】
Individual lines of the poem were very beautiful, but I didn’t see how the lines fit together. To me, the poem wasnt _____.
①
inherent
②
coherent
③
logical
④
corporate
【单选题】
This book has been in the works so long that I have lost _____of most of the sources found for me by the staff of the library.
①
trace
②
trail
③
track
④
touch
【单选题】
_____ for a long time, the fields are all dried up.
①
There has been no rain
②
Having no rain
③
There having been no rain
④
There being no rain
【单选题】
She often says her greatest happiness _____serving the handicapped children.
①
relies on
②
consists in
③
composes of
④
comprises in
【单选题】
_____ me most was that the young boy who had lost both arms in an accident could handle a pen with his feet.
①
That amazed
②
It amazed
③
Which amazed
④
What amazed
【单选题】
We will be losing money this year unless new economic plan of yours _____miracle
①
is working
②
works
③
will be working
④
worked
【单选题】
If you have never planted anything, you won’t be able to know the pleasure of watching the thing you have planted _____.
①
grow
②
to grow
③
growing
④
to be growing