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【单选题】
圆形电磁无心夹具的磁力大小要使工件( ),在受到推力后可产生滑动,以实现无心磨削。A.
被紧紧吸住
B.
受到推力
C.
被吸住但不能吸太紧
D.
不被吸住
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【简答题】The American government consists of three parts, or branches: the ___________, the legislative and the judicial.
【单选题】The study of trees, branches and roots shows that __________.
A.
there were larger amounts of gold in the branches than in the seeds
B.
there were smaller amounts of gold in the roots than in the branches
C.
there were less amounts of gold in the seeds growing on the ends of branches than seeds growing nearest to the tree trunks
D.
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A.
nasal branches
B.
orbital branches
C.
palatine branches
D.
all of the above
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A.
为0 为255
B.
由TCNT0设定 为255
C.
由OCR0设置 255
D.
0 由OCR0设置
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A.
They have 65 branches.
B.
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C.
They have more than 160 ATMs in Hawaii.
D.
Some branches are open on holidays.
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