x-2=0，解得x=2．且x+2≠0，∴x=2．故答案为2．
—What time will you be home?
—I don't know. It depends _________ the traffic. [ ]
A. of
B. on
C. for
D. from
项目动态控制过程中，进行项目目标控制的基础是( )。
A．目标计划值 B．执行计划值 C．目标控制值 D．目标实际值
