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【多选题】
切削三要素是()A.
切削速度υ
B.
背吃刀量a
C.
进给量f
D.
刀具直径
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反馈参考答案：
举一反三
【单选题】The girl was knocked ______ her bike by a car. She shouted ______ the driver angrily.
A.
on, to
B.
into, to
C.
off, at
D.
down, at
【简答题】简述材料的亲水性与憎水性在建筑工程中的应用。
【单选题】,a car knocked her down.
A.
While crossing the street
B.
While she was crossing the street
C.
She crossed the street
D.
Crossed the street
【单选题】____, a car knocked her down.
A.
Walking home
B.
When she had worked home
C.
While walking home
D.
As she was walking home
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