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【多选题】
电梯额定速度大于3.5m/s,关于补偿绳 下列说法正确的是:( )A.
使用张紧轮；
B.
张紧轮的节圆直径与补偿绳的公称直径之比 不小于30 ；
C.
张紧轮应设置防护装置；
D.
用重力保持补偿绳的张紧状态；
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【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】We can see the sun ________ day, but we can't see ________ night. [ ]
A.
in, at
B.
in the, at
C.
in, at the
D.
at, in the
【单选题】. It is only when we cannot see clearly _____ we come to see ______ important our eyes are.
A.
that; what
B.
which; what
C.
that; how
D.
which; how
【单选题】We won’t see any flowers until May .
A.
We will see flowers only in May.
B.
We won’t see flowers after May.
C.
We will see flowers before May.
D.
We will see flowers when May comes.
【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
【简答题】Besides those, what can we see through television? We still can see political______ and the latest exciting ______.
【简答题】When we can see well, we do not think about our eyes often: It is only when we cannot see perfectly that we come to see how important our eyes are. People who are nearsighted（近视的） can only see things ...
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