根据括号内的汉语提示，完成句子
(1)Women teachers are usually more careful and more____ （有耐心的）with the pupils.
(2)Since you've finished your work，why not consider ____ （参观）the park with your friends?
(3)Early in the____  （ 二十） century, two famous scientists developed their personal ideas about dreams.
(4)In order to search for the missing passengers in the MH370, two____ （军人）died.
(5)The film reminded me of the day when I was____ （照顾）care of in the village.
(6)Drive____ （径直）on, and you’ll find the museum on your left.

根据18×4＝72算出下面算式的积

18×40＝____           180×4＝____            1800×4＝____ 

18×400＝____          180×40＝____           180×400＝____ 

如图所示，光滑平台上有两个刚性小球A和B，质量分别为2m和3m，小球A以速度v₀向右运动并与静止的小球B发生碰撞（碰撞过程不损失机械能），小球B飞出平台后经时间t刚好掉入装有沙子向左运动的小车中，小车与沙子的总质量为m，速度为2v₀，小车行驶的路面近似看做是光滑的，求：

（Ⅰ）碰撞后小球A和小球B的速度；

（Ⅱ）小球B掉入小车后的速度．