单项选择题

(All things) (consist of) atoms or molecules, which (be) constantly (moving).()

A. All things
B. consist of
C. be
D. moving

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单项选择题
Workers newly (arrive) from the south (or) rural areas perform their jobs (differently) from those from (other sections) of the city.()

A. arrive
B. or
C. differently
D. other sections
单项选择题
53()

A.capacity 
B.energy 
C.force 
D.power
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