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Most people would describe water like a colorless liquid. They __1__would know that in very cold conditions it becomes a solid called ice and that when heating on a fire it becomes a vapor called steam. __2__However, water, they would say, is a liquid. We have learned that water consists of molecules composed with two atoms of hydrogen __3__and one atom of oxygen, which we describe by the formula H2O.
This is equally true of the solid called ice and the gas called ically there is no difference between the gas, the liquid, and the solid, all of which is made up of molecules with the formula H2O. __4__This is true of other chemical substances; most of them can exist as gases or as liquids or as solids. We may normally think of iron as a solid, but if we will heat it in a furnace, it will melt and become a __5__liquid, and at very high temperatures it will become a gas. Nothing
very permanent occurs when a gas changes into a liquid or a yone knows that ice, which has been made by freezing water,can be melted again by warmed and that steam can be condensed __6__on a cold surface to become liquid water. In fact, it is only because water is so a familiar substance that different names are used for __7__the solid, liquid and gas. Most substances are only familiar with __8__us in one state, because the temperatures requiring to turn them __9__into gases are very high, or the temperatures necessary to turn them into solids are so low. Water is an exception in this respect, which is another reason why its three states have given three different names. __10__
答案：1 改like爲ribe sth as sth 是把……描述成……的.意思。
2 改heating爲heated.在時間，條件，讓步等狀語從句中，當從句主語和主句主語是一致的時候，可以將從句的主語和be的變化形式省略。
3 改with爲 composed of 意思爲“包括，由……組成”
4 改is made up 爲 are made h 指代上文中的 the gas， the liquid，and the solid，表示複數概念，所以要用are
5 將第一個will去掉,在時間條件狀語從句和條件狀語從句中要用現在時表示將來時。
6 by改爲 warm 相當於 when it is warmed
7 改so爲such.
8改with爲to.短語familiar to 後面才能接“某人” familiar with 是接sth
9改requiring爲required.過去分詞短語作後置定語時，和被修飾的名詞時邏輯動賓關係。
10 have 後加 been.動詞give和主語three states 是動賓關係
