所受重力为G的物体漂浮在水面上静止不动。请在图中作出物体所受力的示意图。
--- Seems that Jack is very rich. He is always changing his cars. What is he?
--- ______, but I am not quite sure.
A．Somebody of a manager
B．Something of a manager
C．Anyone of a manager
D．Anything of a manager
划分岗类、岗群、岗系的依据是（）
A.工作繁简难易
B.工作的责任轻重
C.所需人员资格条件
D.工作性质
