问题
填空题
100mL酒精和100mL水混合在一起后，总体积______200mL．（选填“大于”、“小于”或“等于”）原因是______．
答案
酒精是乙醇的俗称，是由乙醇分子构成的．水是由水分子构成的．由于构成物质的微粒之间存在间隔，因此当酒精和水混合之后，分子和分子之间会相互渗透，故总体积将会小于两者的体积之和．
故答案为：小于，分子之间有一定间隔．
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100mL酒精和100mL水混合在一起后，总体积______200mL．（选填“大于”、“小于”或“等于”）原因是______．
酒精是乙醇的俗称，是由乙醇分子构成的．水是由水分子构成的．由于构成物质的微粒之间存在间隔，因此当酒精和水混合之后，分子和分子之间会相互渗透，故总体积将会小于两者的体积之和．
故答案为：小于，分子之间有一定间隔．
| 仿照所给短文从不同几个方面向同学介绍一下Peter 的学习情况。 | |
at 1 . His math teacher said he was a 2 student and his English teacher said he could speak English 3 . However, his history teacher said he could 4 . Another disappointing result was in music. His music teacher said he 5 . | |
| 1._____2._____3._____4._____5._____ |