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【单选题】
用轨迹法切削槽类零件时,槽两侧表面().A.
—面为顺铣、一面为逆铣
B.
两面均为顺铣
C.
两面均为逆铣
D.
不需要做任何加工
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反馈参考答案：
举一反三
【单选题】It is already 9 o'clock, but she still did not______.
A.
come out
B.
come up
C.
show up
D.
turn out
【单选题】We _______ here________ ou come back．
A.
will leave until
B.
will stay till
C.
won't leave after
D.
won- t stay until
【单选题】Mary will not be able to come to the birthday party as she is ______ with a cold.
A.
laid out
B.
laid up
C.
laid by
D.
laid down
参考解析：
知识点：
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