题目

进入秋冬季节后，雾霾这种环境污染问题逐渐凸显。从物质分类来看雾霾属于胶体，它区别于溶液等其它分散系的本质特征是：        （    ）                           A．胶粒可以导电                      B．胶体粒子大小在1~100nm之间      C．胶体是混合物                        D．胶体的分散剂为气体根据句子意思和括号中的中文提示填空，每空一词。【小题1】The tourists had no     【小题2】    (选择) but to wait for the next train.【小题3】I like this photo best because it     【小题4】    (使想起) me of my happy childhood.【小题5】I sent her an e-mail yesterday. But she hasn’t     【小题6】    (回复) to it.【小题7】Our teachers are all very      【小题8】   (严格) with us students.【小题9】 In China, you have to be 18 years old before you are     【小题10】     (允许) to drive a car.