对于直接承受动力荷载的结构,计算正面直角焊缝时 。 A.
要考虑正面角焊缝强度的提高 B.
要考虑焊缝刚度影响 C.
与侧面角焊缝的计算式相同 D.
取βf =1.22

Nuclear diplomacy 的翻译为核电外交。（ ）A．对 B．错

单项选择题Nuclear diplomacy 的翻译为核电外交。（ ）

Near the end of the movie Will finally realizes what re...

单项选择题Near the end of the movie Will finally realizes what really matters to him. Who or what is it?
A、 Rachel.
B、 Marcus.
C、 His dad’s song.
D、 His independence and freedom.

设,那么当增大时，不变. A、正确 B、错误

单项选择题设,那么当增大时，不变.
A、正确
B、错误