车辆两台车交叉脱轨时，起复一端后将复轨器更动一下位置起复另一端使用的是（）复轨器。

A.海参型

B.人字型

C.组装式

D.腰部加固人字型

阅读下面短文,按照句子结构的语法性和上下文连贯的要求,要求在空格处填入一个适当的词或使用括号中词语的正确形式填空

With the 小题1:____________ (develop) of industry, air pollution is getting more and more serious. In Beijing, many people suffer different kinds of illnesses because 小题2:___________ air pollution.

Air pollution is caused by the following 小题3:_________: about half of the problem is caused by vehicles. There are more and more cars, buses on the roads, and they give off 小题4:__________(poison) gases. 25% of air pollution is caused by factories. Another factor is the smokers. Smoking not only does harm to their health 小题5:__________ to others. 小题6:_________ these, about 10%of air pollution is caused by other reasons.

We should take some measures to fight 小题7:____________ pollution. New fuel can be used to take 小题8:___________ place of gas. We can plant more trees. If everybody realizes the 小题9:___________(important) of environment and does something to stop pollution, the problem will 小题10:____________ (solve).