在对后制动器调整后或对制动油管掉换过后，要进行制动系统（），将旧油排放，加新油至（）。
参考答案：排放空气操作，制动器中位
同义句转换。
1. People tell me how I can get to the station.
People tell me how ________________ the station.
2. Mike didn't see anybody enter the building before ten.
Nobody _______________ the building before ten.
3. The bench was so long that all of us were able to sit on it.
The bench was long enough ________________.
4. I think that it is important to master a foreign language.
I think ________________ a foreign language.
5. Mary spent three thousand yuan on the color TV set.
The color TV set _______________ three thousand yuan.
到了（），中国的陶瓷生产开始进入繁荣阶段。
A.清代
B.隋唐两代
C.明代
D.宋代
