2017年秋外研版必修1 Module5 Section Ⅲ课时作业含答案 Ⅰ.单词拼写 1．Water will turn into steam when heated to 100℃. 2．Events in early childhood help to form our personalities in later life. 3．I looked up at the clouds floating in the sky. 4．To do the experiment, you need two balances (天平) and some other materials that react with oxygen. 5．People are not allowed to use matches or any open flame (火焰) in the forest. 6．Some substances don’t dissolve (溶解) in water whether they are heated or not.