题目内容

冲制一工件,冲裁力为F,采用刚性卸料、下出件方式,则总压力为()

A. 冲裁力+卸料力
B. 冲裁力+推料力
C. 冲裁力+卸料力+推料力

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一根导线,其阻值为R,若将其从中对折成一段新导线,其阻值为()。

A. R
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C. R/4

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A. we receive,not
B. we have received,never
C. did we receive,hardly
D. had we received,certainly

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