题型:问答题 从大坝流下的水能冲击水轮机发电,正在工作的打桩机能将桩打人地下.表明被举高的物体也具有能量,这种能叫做______,弹性势能和重力势能统称为______.把100mL水和100mL酒精混合在一起,结果总体积小于200ml,说明______.固体和液体很难被压缩,说明了______. 查看答案
题型:问答题 Many experts hold the view ____teacher development is _____the key to better education lies.A.which, whereB.which, in whichC.that, whereD.that, in which 查看答案