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【单选题】
经济型数控车床多采用( )刀架。A.
立式转塔刀架
B.
卧式转塔刀架
C.
双回转刀架
D.
以上均可
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【单选题】He paid the boys $ 10 for washing ten windows, most of _______ hadn't been cleaned for at least a year
A.
these
B.
those
C.
that
D.
which
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