CC蓄电池固定螺栓的力矩是（）
A.20NM
B.22NM
C.35NM
D.9NM
参考答案：C
A professor of biology gave a talk to more than 1000 students on elephants living conditions and the dangers _______ them.
A．face
B．facing
C．faced
D．are facing
下列不是合同相对性规则集中体现的是( )
A．主体 B．内容 C．责任 D．形式
