盘、柜在安装固定好以前，应有（）的措施，特别是重心偏在一侧的盘柜。
A.防碰撞
B.防坠落
C.防止倾倒
D.防盗
参考答案：C
质点从O点起由静止开始做匀加速直线运动，依次通过A、B、C三点，已知质点由O到A经历的时间为1s，OA的距离为4m，
（1）若质点由A到B经历的时间为2s，由B到C经历的时间为1s，求BC的距离；
（2）若AB的距离为2m，BC的距离为4m，求质点由B运动到C经历的时间．
— Let's give up. It's too late. I don't think any bus will come.
— I don't care. I'll get there ________ I have to walk all the way.
A． as if
B． so that
C．even if
D．now that
