影响人际关系的隐性因素有哪些？

______ fired, your health care and other benefits will not be immediately cut off.

A. Would you be  B Should you be     C. Could you be     D. Might you be

Obviously, ______ no one wants to be alone all the time, everyone needs some degree of privacy.[ ]

A. if        

B. but          

C. although        

D. because

气压式动力转向系统的压力波动大，在高寒地区易出现冰堵，故目前很少采用。（）

下列选项可用阴阳互根互用解释的是（）

A.寒极生热

B.阴病治阳

C.寒者热之

D.重阴必阳

E.阴中求阳

树中度为零的结点称为______。