When the room gets too cold, the piece of metal on the outside gets shorter and moves the arm to the left. This turns on the heating system and more fuel is burned to warm the house. The purpose of putting a thermostat into a heating system is to control temperature. In hot climates what is important is to cool houses by sending fresh cold air through them. We can control the temperature of the rooms ad in addition dry the air and have a climate of our own making indoors. Every ice chest has a climate of its own inside it. It is strange and surprising, but true, that ice chests are kept cold by suing heat. The heat is supplied by electric power or by burning gas. Scientists tell us that before long we will be using the sun’s heat to cool buildings. This will make life in hot climates much easier. will dry dry(ies) dried本書特色 淺顯易懂的內容＋圖像式學習＝不再排斥學習英文！ 沒有一長串的文法，沒有難懂的說明，只有單純的文字與圖像，卻能提升英文能力。每個句子及段落都輔以圖像作說明，不但更活潑有趣，也讓學習英文不再有距離感。 本書適合學習英語的入門者，簡明的編排方式，讓你閱讀起來沒有負擔。適合攜帶的開本大小，讓你能隨時隨地學英文，不論是等人、搭車等零碎的時間，都能把握時間加以學習。一點一點地累積，打造你的英語閱讀力。
