辽宁高一英语2019年上半年期末考试免费试卷完整版（含答案和解析）.docx

想预览更多内容，点击预览全文
点击预览本文档（全文）

申明敬告：

本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己完全接受本站规则且自行承担所有风险，本站不退款、不进行额外附加服务；如果您已付费下载过本站文档，您可以点击这里二次下载

文档介绍

辽宁高一英语2019年上半年期末考试免费试卷完整版

1、阅读理解

Easy floating

If you have ever been swimming in the ocean, you may have noticed that sea water is easier to float in than pool water. Here’s why: You’ll need ? Two clear bowls ? Food coloring ?Spoon ? Salt ? Two eggs 1. Fill bowls halfway with water. 2. Add 10 tablespoons of salt to one bowl, mix until it dissolves, and then add several drops of color. 3. Carefully put an egg into each bowl of water, and watch what happens. What happens? The egg in the plain water sinks. The egg in the salt water floats. (If the salt water egg does not float well, mix more salt into the bowl. ) The water and salt particles (粒子) in the salt water bowl are closer together than plain water particles are. They press harder against the egg than the plain water particles do and t

最近下载