第5题: [单项选择]Questions 19 to 22 are based on the conversation you have just heard A. Newspapers that are interesting. B. Newspapers that report more good news. C. Newspapers that have less advertisements. D. Newspapers that agree with their political opinions. 参考答案:D 答案解析:[听力原文] Q: What kind of newspapers do people tend to read according to the woman [答案详解] 当谈
第6题: [单项选择]混合碳四产品不合格,碳三含量偏高的原因是()。 A. 脱丁烷塔回流量偏低 B. 脱丁烷塔釜加热量偏高 C. 脱丁烷塔进料量过大 D. 低压脱丙烷塔灵敏板温度设定偏低 参考答案:D