题型:问答题 简答题 调节好的天平两盘中各放一个完全相同的烧杯,左杯注入50mL的液体,右杯放入50g的砝码,便能平衡,由此可知( )A.砝码体积必须为50cm3B.液体密度必须大于水的密度C.液体密度为1.0×103kg/m3D.以上说法都不对 查看答案
题型:问答题 简答题 某人在测一段不太长的曲线长度时,用一条松紧绳与曲线完全重合,然后用力把松紧绳拉直,用刻度尺量出起点到终点的距离,则测量的结果比实际曲线 [ ]A.偏大 B.偏小 C.一样大 D.无法判定 查看答案
题型:问答题 简答题 Questions 1-4What does the man promise to do for the woman?()A.Give her some advice on how to strike a bargain.B.Introduce her to the local people.C.Help her with the volunteer work.D.Show her around the ancient cathedral city. 查看答案