【简答题】A.The government is spending money on some forms of public transport. B.Only rich people can use their cars. C.Many poorer people need use their cars to make a living. D.The government needs to spend ...
【判断题】社会是一个系统,对社会中的要素进行选择。()
【判断题】社会是对社会中要素进行选择的一个系统。()
【判断题】插床主要用于加工工件的内表面,插削的主运动是插刀的往复运动。
【判断题】插床主要用于加工工件的内表面,插削的主运动是插刀的往复运动。