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搜题
【单选题】
精,加工精度和表面粗糙度要求较高,应选择( )的背吃刀量和进给量。A.
较小
B.
较大
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皮皮学刷刷变学霸
举一反三
【单选题】One of the most important weapons used during the second would war _______ not a weapon used against people, but rather a drug used against disease.
A.
is
B.
was
C.
were
D.
are