客车车体主要腐蚀原因是什么?
参考答案:
1、设计问题;
2、修造工艺问题;
3、使用不当;
4、运用条件影响;
5、材质影响。
2005年8月商品零售相比上年( )。
A.增长1%
B.减少1%
C.增长0.3个白分点
D.下跌0.3个百分点
— How much of the foreign expert's speech have you understood?
— Next to nothing. I wish I _____ harder at English.[ ]
A. worked
B. had worked
C. would work
D. were working