何谓应力腐蚀开裂?
参考答案:
拉伸应力和腐蚀介质同时作用下的腐蚀,叫做应力腐蚀开裂,大部分的合金容易出现这种腐蚀。但是,某一种合金,只有在一定的介质中才产生应力腐蚀开裂。
— Why did you give up the job in Australia?
— Because I don't want to stay far away from my family. You know, my family means ______ to me.[ ]
A. everything
B. nothing
C. anything
D. something
公共选择学说隐含的一个观点是市场失灵。