问题
判断题
PP的耐老化性能比PE差。
答案
参考答案:对
PP的耐老化性能比PE差。
参考答案:对
阅读下面对话,从方框内7个选项中选择5个恰当的句子完成此对话。
B: 小题1:__ A: What did you do there? B: I found out that the factory was pouring waste water into the river near it. 小题2:__. Lots of fish have died. A: 小题3:_. B: Do you think “Greener China” can do something? A: 小题4:__ . We can write a story about it to the TV station and the newspaper. B: 小题5:__ . Businessmen are afraid of newspapers and TV stations. |