解析 【解析】【答案】boil; boils 【解析】本题结合句意,后面是when引导的时间 状语从句,从句中water是第三人称单数,且由主 句happens可知时态为一般现在时,故从句时态也 为一般现在时,boil动词,煮沸,沸腾,这里要用 第三人称单数boils。故本题答案为boil;boils。 反馈 收藏
【解析】boil 作动词,表示沸腾,煮沸;A to boil 不定式形式;B boiling 现在分词形式;C will boil 将来时;D boils 主语是第三人称单数形式;根据句意,水沸腾是一种客观现象,所以句子时态是一般现在时。水是主动发生了沸腾boil这个工作,并且“water(水)”是不可数名词作主语,故用单数第三人称的谓语动词形式。...
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If I were to heat the melted water to its boiling point, what would happen to the entropy of the system? If you were to heat melted water to its boiling point, what would happen to the entropy of the system? What happens to the density of water as it starts to freeze?
The water leaves the ground and becomes water vapor(蒸气) in the air. When the water vapor touches the cold air, it again be-comes water and falls to the ground as rain.It is similar to boiling water. If you boil water in a pot, the heat changes, so the water turns into hot ...
Water becomes water vapor(蒸气) in the air and leaves the ground. When the water vapor touches the cold air, it becomes water again and falls to the ground as rain.It is similar to boiling water. If you boil water in a pot, the heat changes, so the water turns into hot water ...
If you need to use the tap, water should be brought to a "rolling boil" for at least one minute to kill any bacteria. Boiling water will make it safe for the following activities: drinking, brushing teeth, washing fruits and vegetables, preparing baby food and formula, mak...
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If matter becomes heavier when energy is added (heated), explain why water molecules evaporate when heated. What happens to the temperature of a pan of water when evaporation exceeds the condensation? A pot contains 241 g of water ...