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【单选题】
切削用量是度量切削运动大小的参数,它包括:( )。A.
机床转速，进给量，背吃刀量
B.
机床转速，进给量，切削速度
C.
进给量，背吃刀量，切削速度
D.
进给量，切削速度，加工余量
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】The _______ driver drove his car very ____ ___ and it crashed _______ a tree.
A.
careless ；carelessly ；into
B.
careless ； carefully ；on
C.
careless ； carefully ；on
D.
careful；carelessly ；into.
【单选题】The car was running so fast that it crashed into the truck and the driver was killed ______the spot.
A.
on
B.
at
C.
by
D.
to
【单选题】The car crashed into the back of a truck and the driver was trapped for about an hour being taken to hospital.
A.
when
B.
before
C.
after
D.
until
【单选题】The car crashed into the train, and the driver was killed ______ the spot.
A.
on
B.
at
C.
to
D.
by
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