在水处理中,“混凝”的工艺过程实际上分为( )步骤。
A.1个 B.2个 C.3个 D.4个
参考答案:B
解析:“混凝”的工艺过程实际上分为混合和絮凝2个步骤。
某物体沿直线运动,先以6m/s的速度由A匀速运动到B,接着又以9m/s的速度由B匀速运动到C。已知由A运动到C这一全程的平均速度为8m/s,求AB距离与BC距离之比。
—Mary told me she would ________ computer studies.
—Really? I’ll try my best to ask her to_________ such foolish ideas.
A.pick up; give up
B.put away; give up
C.give up; put away
D.give up; pick up