国家对出口电池产品实行( )专项检测制度。
A．审批和铅含量
B．备案和汞含量
C．备案和铅含量
D．审批和汞含量
参考答案：B
My mother likes basketball ______ she doesn't like ping-pong. [ ]
A. and
B. but
C. thought
D. too
应用人类学
