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【简答题】
在没有信号输入时,仍有水平扫描线,这时示波器工作在( )。
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举一反三
【单选题】When we see well, we do not think about our eyes very often. It is only when we cannot see perfectly that we realize how important our eyes are. People who are nearsighted can only see things that are...
A.
only when we cannot see perfectly
B.
only when we can see well
C.
even if we can see well
D.
only when we realize how important our eyes are
【单选题】____ he said to us yesterday____ true?
A.
What can, was
B.
That can, was
C.
Can what, be
D.
Can that, be
【单选题】It can be learned from the first two paragraphs that ______.
A.
even prestigious universities struggle to enroll excellent students
B.
campus environment plays an important role in recruiting students
C.
universities in Britain are unbalanced in student enrollment
D.
top universities in the U.K. are all funded by the government
【单选题】_____ see in the picture? [ ]
A.
Else what can you
B.
What else can you
C.
What else you can
D.
Who can you else
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