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【判断题】
只要平面内力偶的力偶矩保持不变,可将力偶的臂作相应的改变,而不影响其对刚体的效应。A.
正确
B.
错误
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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】In this chapter, some cases will be introduced to readers ______ people with strong determination achieve their goals by working extremely hard. [ ]
A.
when
B.
who
C.
which
D.
where
【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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