制动软弱无力的主要原因是()
A、漏油
B、制动系统内有空气
C、制动泵不起作用
参考答案:B
疳者甘也的含义是指()
A.病证
B.病位
C.病情
D.病因
E.症状
Regulations on the levy of import duties on incoming passenger’s luggage and articles shall be formulated by ______. A. the Customs General Administration B. the Tariff Commission C. the State Council D. the Economic Planning Commission