柴油机机油热交换器活动端压环上有—些径向孔，用以排出热交换器内部产生的气体。
参考答案：错
The traffic lights are the in every country.[ ]
A. same
B. different
C. difference
You eat too much ______, so you’re fat. [ ]
A. tomatoes
B. fruit
C. hamburgers
D. dessert
