回转机构液压系统主要的工作负荷是（）。
A.重力
B.惯性力
C.运动阻力
D.B和C
参考答案：D
_________ the global financial crisis, the Chinese government has taken many measures _______ people ‘s life to deal with it.
A．Faced with; related
B．Faced; relating to
C．Faced with; relating
D．Facing, related to
停车视距
