处于低温环境的结构，应选择（）的钢材。
A．韧性好
B．刚度大
C．脆性临界温度低
D．锚固性好
E．疲劳极限较高
参考答案：A, C, E
After he had broken the world record, Rod ____ to a restaurant to celebrate with hid friends.
A．went
B．had gone
C．would go
D．has gone
路拱
