（1）已知R为全集，A={x|-1≤x＜3}，B={x|-2＜x≤3}，求（CR

He always tell ____ lies, to tell you ____ truth, I don’t believe what he said at all.

A．/; /

B．the; the

C．/; the

D．the; /

端午节小王和同学到小西湖划船游玩，划船用的桨是______杠杆（选填“省力”或“费力”）．当船在水中匀速行驶时，船受到______作用（选填“平衡力”或“非平衡力”）．

Mr Li _____ the students' work when I entered his room. [ ]

A. goes over

B. went over

D. is going over

D. was going over

非机动车不经公安机关交通管理部门登记，也可上道路行驶。

水泥加水拌合形成______，经本身化学物理变化，逐渐变稠失去塑性，称为______。