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【单选题】
055 10021 : C 语言的 for 语句中的表达式可以部分或全部省略,但两个 ( ) 不可省略。但当三个表达式均省略后,因缺少判断条件,循环会无限制地进行下去,形成死循环。
A.
<< /div>
B.
++
C.
;
D.
,
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C.
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D.
轴的直径
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A.
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B.
No
C.
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D.
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【单选题】通常根据( )来选择小链轮的齿数z 1 。
A.
传动比
B.
计算功率
C.
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D.
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【单选题】通常根据( )来选择小链轮的齿数z1。
A.
小链轮的转速
B.
传递的功率
C.
传动比
D.
链速
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