用力法且采用图b所示的基本体系计算图a所示梁,△1p为()。
A.A
B.B
C.C
D.D
参考答案:B
解析:
由图乘法可得
Thanks to your party next week. [ ]
A. for me inviting
B. for your invitation
C. to inviting me
D. to invite me
冲裁模具固定板一般采用哪种材料()
A.MoCr铸铁
B.45#
C.20#
D.Q235-A