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【单选题】
() 是指加工表面、加工工具和切削用量中切削速度和进给量都不变的情况下,所完成的那一部分工序内容。A.
工序
B.
工位
C.
工步
D.
复合工步
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皮皮学刷刷变学霸
举一反三
【单选题】tumble
A.
annoy or offend sb.
B.
fall down quickly and suddenly
C.
climb up quickly and suddenly
D.
force sb. to leave a place
【单选题】The farmer grows various kinds of crops, __________wheat, cotton and rice.
A.
for example
B.
as
C.
that is
D.
such as
【简答题】Students read various kinds of books in it.
【单选题】On New Year’s Eve, various kinds of food are prepared in order to menisfest their devotion to ______.( )
A.
friends
B.
relatives
C.
ansestors
【单选题】By piecing together all kinds of evidence collected by various expeditions, the researchers believe the Mayas to be Indians, whose ancestors had come from Asia.
A.
Y
B.
N
C.
NG
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