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【单选题】
X6132型万能铣床启动主轴时,先接通电源,在把换向开关SA3转到主轴所需要的旋转方向,然后按启动按钮SB3或SB4接通接触KM1,即可启动主轴电动机( )。A.
M1
B.
M2
C.
M3
D.
M4
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【单选题】There is a new problem involved in the popularity of private cars ___________ road conditions need _____________.
A.
when; improving
B.
which; to be improved
C.
where; improving
D.
that; to be improved
【简答题】下列程序段的输出结果是【 】。 include＜iostream.h＞ void main() {int i=10，sum=0； do { sum=+sum+i； i=i-2; }while(i＞＝2)； cout＜＜sum＜＜end1； }
【单选题】There is a new problem involved in the popularity of private cars_______ road conditions need to be improved.
A.
that
B.
which
C.
where
D.
when
【单选题】There is a new problem involved in the popularity of private cars __________ road conditions require __________.
A.
that ... improving
B.
which...to be improved
C.
where ...improving
D.
when...improving
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