串级汽温调节系统中副回路和副调节器的任务是快速消除外扰。()
参考答案:错
已知集合M={2,5,8},N={5,8,9,10},则M∪N=( )
A.{2,5,8,9,10}
B.{5,8}
C.{9,10}
D.{2}
In order to let more people pay attention to their plan, they _________ some signs on the wall.
A.put on
B.put up
C.set up
D.give up