第22题: [单项选择]下列关于建筑钢材的力学性能的说法中,正确的是( )。 A. 强屈比愈小,钢材受力超过屈服点工作时的可靠性越大,安全性越高 B. 伸长率越大,说明钢材的塑性越小 C. 钢的冲击韧性受温度的影响较大,冲击韧性随温度的下降而减小 D. 脆性临界温度的数值愈高,钢材的低温冲击性能愈好 参考答案:C
第23题: [单项选择]Questions 11 to 18 are based on the conversation you have just heard. A. She should follow the human nature. B. Strangers are nothing to be afraid of. C. Feeling nervous is nothing improper. D. She should accept strangers’ presents naturally. 参考答案:C 答案解析:[听力原文] W: I need your help, John, I feel very nervous whenever speaking in the presence of many s