第12题: [单项选择]{{B}}Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. The barbecue has been canceled. B. The weather will probably be cool. C. The man will not be able to attend the barbecue. D. Casual dress will be appropriate. 参考答案:D 答案解析:[听力原文]
M: I’ll be coming straight from work,so I’ll have to pack a change of clothes.
W:It’s only
第17题: [单项选择]区别质变和量变的根本标志是 A. 量变是渐变,质变是突变 B. 量变是连续性的变化,质变是不连续性的变化 C. 量变不超出度的范围,质变超出度的范围 D. 量变由外力推动,质变源于事物的内部矛盾 参考答案:C 答案解析:质变与量变的区别是多方面的,但最根本的区别在于是否发生新旧事物的转变。