温馨提示：
此套题为Word版，请按住Ctrl,滑动鼠标滚轴，调节合适的观看比例，答案解析附后。关闭Word文档返回原板块。
语篇训练卷(十二)
Module 5 Introduction & Reading and Vocabulary
阅读理解
A
Chemical Change and Physical Change
There are two kinds of changes—chemical change and physical change.
In a chemical change, there is always a new substance formed. Breaking up water into hydrogen and oxygen is a chemical change. In each of the chemical change at least one new substance is formed. A change is not a chemical change if it doesn’t form a new substance.
Physical changes are very common, too. There are many examples. You can make a physical change by tearing a piece of paper into two, or by cutting a piece of iron with lathe(机床). Here paper is still paper, and the iron is still iron.
