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【单选题】
测定油类的水样，水面至水面下()毫米采集柱状水样。采样瓶(容器)不能用采集水样冲洗。A.
100
B.
200
C.
300
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举一反三
【单选题】In some cases, recycling could be hazardous to the environment if special precautions are not taken because ______.
A.
industrial emissions are sometimes created in the process
B.
chemical waste is sometimes produced as a result
C.
a great deal of energy is expended to create new products
D.
there are a lot of bacteria in waste things
【单选题】In some cases, the thesis and plan of development appear in the same sentence in a well-written introductory paragraph. However, writers sometimes choose not to describe _________.
A.
the thesis or the plan of development
B.
the thesis
C.
the plan of development
D.
the thesis and the plan of development
【单选题】—Better get down to your work, Tom. —_________.
A.
It’s my pleasure
B.
Don’t mention it
C.
Mind your own business
D.
You’re welcome
【单选题】The paper studies some ______ cases in which something somehow wrong leads to the miscommunication, so that English teachers may improve their teaching. [ ]
A.
distant
B.
typical
C.
exotic
D.
misleading
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