第7题: [单项选择]报告和论文的附录() A. 不是必需的 B. 是必需的 C. 与正文不要连续编页码 D. 与正文是独立的 参考答案:A
第8题: [单项选择]断口为结晶状的断裂是() A. 塑性断裂 B. 一次性断裂 C. 疲劳断裂 D. 混晶断裂 参考答案:B
第9题: [单项选择]吐温类表面活性剂溶血作用的强弱顺序是() A. 吐温20>吐温40>吐温60>吐温80 B. 吐温80>吐温60>吐温40>吐温20 C. 吐温80>吐温40>吐温60>吐温20 D. 吐温20>吐温60>吐温40>吐温80 E. 吐温40>吐温20>吐温60>吐温80 参考答案:D
第27题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard. {{/B}} A. Driving a car. B. Taking a taxi. C. Going by train. D. Taking the subway. 参考答案:D 答案解析:[听力原文]
W: I have to go to the other side of the town, but it’s the rush hour nm.
M: Driving is not