在切削条件不变的情况下，工件材料的塑性和韧性越大，切削力则越小；而工件材料的强度和硬度越高，则切削力越大。( )
参考答案：错
—Could you please tell me something about the two _____?
—_____.They are exchange students of No.1 Middle School. [ ]
A. Frenchmen; Yes, please
B. Frenchmens; Come on
C. Germen; Not at all
D. Germans; All right
某带壁柱砖墙及轴向压力的作用位置如图所示，设计时，轴向压力的偏心距e不应大于多少毫米（）？
A.161
B.193
C.225
D.321
