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【单选题】
在煤矿爆破作业中，说法中不正确的是（）。A.
工作面风量不足时，不准爆破
B.
工作面未检查瓦斯浓度或20米范围内瓦斯浓度达到1%时，不准装药爆破
C.
一次装药，可以分两次或多次爆破
D.
一个工作面不可以同时使用二台发爆器同时进行爆破
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举一反三
【单选题】Then professor walked onto the platform and seated himself in a chair, ______ for answering questions.
A.
had prepared
B.
being prepared
C.
preparing
D.
prepared
【单选题】The professor walked onto the platform and seated himself in a chair, for answering questions. [ ]
A.
had prepared
B.
being prepared
C.
was preparing
D.
prepared
【简答题】1-3-1 .简述货币流通的内涵。
【单选题】The professor walked into the classroom and he carried a bag of books with him.
A.
The professor walked into the classroom,carrying a bag of books with him.
B.
The professor walked into the classroom ,carried a bag of books with him.
C.
The professor walked into the classroom to carry a bag of books with him.
D.
The professor walked into the classroom, carry a bag of books with him.
【简答题】The professor walked onto the platform and seated himself in a chair,________ for answering questions. A．had prepared B．being prepared C．preparing D．prepared
【单选题】The professor walked into the lab,___his students.
A.
to be followed
B.
followed by
C.
following
D.
being followed
【单选题】The professor walked into the lab,_________his students.
A.
to be followed
B.
followed by
C.
following by
D.
being followed
【单选题】The professor walked onto the platform and seated himself in a chair, ____ for answering questions.
A.
had prepared
B.
being prepared
C.
preparing
D.
prepared
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