(2012)影响焊接钢构件疲劳强度的主要因素是:()
A.应力比
B.应力幅
C.计算部位的最大拉应力
D.钢材强度等级
参考答案:B
---How did the plan strike you?
---Great, indeed!_______. I can not speak too highly of it.
A.In fact
B.Be sure
C.After all
D.As a result
凡是在我国居住的、年满18周岁的居民就是我国公民。