题型:名词解释 China is trying to find ways to take care of the children ______ parents have left their homes to work in cities. [ ]A. that B. who C. whose D. which 查看答案
题型:名词解释 电梯内用弹簧秤测物体的重量,下列几种情况,弹簧秤示数最小的为( )A.以2m/s2的加速度加速上升B.以3m/s2的加速度减速上升C.以3m/s2的加速度减速下降D.以2.5m/s2的加速度加速下降 查看答案