下面图示工厂生产过程中,对大气污染最严重的是( )
A: 化工厂
B: 面包厂
C: 汽车厂
D: 服装厂
看汉字,写拼音。
____
吧
您
那
第一次世界大战的爆发,是协约国和同盟国矛盾不断激化的结果,下列有关一战的事件按发生时间的先后顺序排列正确的是
①三国同盟正式形成②英俄签订协约③英法签订协约④萨拉热窝事件
Mike's Experience in Learning English
Starting Age
Mike started to learn English at the age of .
Problems
He was not good at at first.
Feelings
He was , and even no interest in learning English.
Helper
His helped Mike with his problems.
Result
He to improve his English.
以下现象与相应物理知识的说法,错误的是( )