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【单选题】
在工件表面粗糙度值要求为Ra12.5~25μm 时,端铣的加工余量小于3mm,则粗铣 ( )就可以达到要求。A.
一次
B.
二次
C.
三次
D.
四次
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【简答题】The fellow has never met a thief and firmly believes that he lives in a world without thieves. And, the female thief fights against other thieves only to protect this guy's 'daydream'. Sound str...
【单选题】The fellow left without a word as if ________．
A.
never to return
B.
never returning
C.
he had never returned
D.
he would never be returning
【简答题】The fellow has never met a thief and firmly believes that he lives in a world without thieves. And, the female thief fights against other thieves only to protect this guy's 'daydream'. Sound str...
【单选题】The fellow never ______anything for very long.
A.
sticks to
B.
sticks up
C.
goes over
D.
goes to
【单选题】The fellow is very ______ . He never asks others for advice.
A.
conceited
B.
proud
C.
thoughtful
D.
selfish
【简答题】Most of his fellow students believe in cramming the night before a test. He never does so. (though)
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