焦油加工的主要任务是获得酚、萘、蒽等纯产品和（）等粗产品。
参考答案：洗油沥青
—How about your journey to Mount Emei?
—Everything was wonderful except that our car ________ twice on the way.[ ]
A. slowed down
B. broke down
C. got down
D. put down
摘车临修的故障范围中弹簧故障规定有哪些？
