某公司从境外进口清凉饮料2000箱(24×300mL/箱)，申报价格CIF广州45元

设a＞l，则log_0.2a、0.2^a与a^0.2的大小关系是[ ]

A．log_0.2a＜0.2^a＜a^0.2　　

B．log_0.2a＜a^0.2＜0.2^a　　

C．0.2^a＜log_0.2a＜a^0.2

D．0.2^a＜a^0.2＜log_0.2a

膀胱上皮来源于（）

A.外胚层

B.内胚层

C.中胚层

D.内胚层和中胚层

E.外胚层和中胚层

It was not you but Tom and his wife that __the car accident.[ ]

A. was to blame for

B. were to blame for

C. was to be blamed for

D. were to be blamed for

多数海产品受( )污染，未煮透食后常造成腹泻

A．伤寒杆菌
B．副溶血性弧菌
C．痢疾杆菌
D．金黄色葡萄球菌
E．霍乱弧菌

简述安装油罐阻火器的注意事项。