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【单选题】
粗镗(扩)→半精镗→精镗工件内表面的表面粗糙度Ra为( )。
A.
1.6 ~ 2.5
B.
3.2 ~ 6.3
C.
2.5 ~ 3.2
D.
0.8 ~ 1.6
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参考答案:
举一反三
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【判断题】施密特触发器有两个不同的触发电平,且存在回差电压
A.
正确
B.
错误
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【单选题】It is indicated in Paragraph 2 that workers nowadays
A.
have less and less bonus.
B.
can see their dim future.
C.
work overtime without payment.
D.
can see the chance of promotion.
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【单选题】下列各组元素中 ,性质最相似的两个元素是
A.
Mg和Al
B.
Zr和Hf
C.
Ag和Au
D.
Fe和Co
【单选题】John is a project manager who gets the job done through salary, promotion, and bonus incentives. He is using which of the following types of interpersonal influence?
A.
Reward power
B.
Expert power
C.
Referent power
D.
Formal authority
【单选题】下列各组元素中,性质最相似的两个元素是
A.
Zr 和 Hf
B.
Mg 和 Al
C.
Ag 和 Au
D.
Fe 和 Co
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