第29题: [单项选择]Questions 19 to 22 are based on the conversation you have just heard. A. Plant some trees on campus. B. Organize a picnic. C. Build a parking lot. D. Protect the natural beauty on campus. 参考答案:D 答案解析:[听力原文] What is the student action union trying to do
由选项猜测本题与“it”要做某事有关。本题关键句为“we are try
第30题: [单项选择]托盘的优点不包括______。 A. 成本低,自重小 B. 装盘容易 C. 托盘本身的回运可以节约资源 D. 降低包装成本 参考答案:C