题目内容

such intense public debate about the place of the university and its role in socitety.

A. Never there before has been
B. Never before there has been
C. Never before has there been
D. Never there has been before

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It surprised us there was so little stone in the wall, all the construction material was of mud brick.

A. which
B. who
C. whom
D. that

切削加工时，刀具材料和工件材料不同，切削液选择方法不同。其中，（）一般不需要使用切削液。

A. 高速钢刀具、加工塑性材料
B. 硬质合金刀具、加工塑性材料
C. 高速钢刀具、加工脆性材料
D. 硬质合金刀具、加工脆性材料

高速钢的红硬温度高达（）℃左右。

A. 300
B. 400
C. 550
D. 650

在选用刀具的刃倾角时，（）做法是正确的。

A. 粗加工取正刃倾角
B. 粗加工取负值
C. 精加工取负刃倾角
D. 微量切削的精加工刀具取负刃倾角