第2题: [单项选择]Questions 19 to 21 are based on the conversation you have just heard. A. Neutral. B. Cautious. C. Favorable. D. Negative. 参考答案:C 答案解析:[听力原文]19-21 M: We’re having a debate on advertising Thursday evening and I have to take part.<
第3题: [单项选择]有关影响滤过因素的叙述,错误的是 A. 滤过面积增大,滤速加快 B. 降低药液粘度,可加快滤速 C. 增加滤器上下压力差,可加快滤速 D. 使沉淀颗粒变粗,可减少滤饼对流速的阻力 E. 常压滤过速度大于减压滤过速度 参考答案:E