题型:问答题 简答题 She recognized him because of the hat. He was standing with his back to her on a cliff ________ out across a dark sea. A.to lookB.lookingC.lookD.looked 查看答案
题型:问答题 简答题 We______ to see the movie Life of Pi as soon as school is over.A.goB.wentC.will goD.was going 查看答案
题型:问答题 简答题 常温下,在28.9g水中溶解12.1g Cu(NO3)2·3H2O,恰好达到饱和,设该溶液密度为1.20g /cm3,求:(1)该溶液中Cu(NO3)2的物质的量和溶液的体积 (2)该溶液中Cu(NO3)2的物质的量浓度 (3)取出20.0ml该溶液,配成浓度为1.00mol/L的稀溶液,则稀释后溶液的体积是多少毫升? 查看答案