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【单选题】
一把梯形螺纹车刀的左侧后角是0°,右侧后角是8°,这把车刀( )。A.
(A)可以加工右旋梯形螺纹
B.
(B)可以加工左旋梯形螺纹
C.
(C)被加工螺纹的旋向与其无关
D.
(D)不可以使用
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【单选题】以下程序执行后sum的值是() void mian() { int i,sum; for(i=1;i<6;i++) sum+=i; printf("%d\n",sum); }
A.
15
B.
14
C.
输出错误
D.
0
【单选题】以下程序执行后sum的值是（ ）void main(){int i,sum;for(i=1;i6;i++) sum+=i;printf(%d\n,sum);}
A.
15
B.
14
C.
不确定
D.
0
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