When we boil water, it changes from liquid to ___. A. solid B. liquid C. gas D. none of the above 相关知识点: 试题来源: 解析 C。此题考查水的状态变化。当我们煮水时,水从液态变为气态(gas)。选项 A 是固态;选项 B 是液态,不符合变化;选项 D 以上都不对,不正确。反馈...
根据第一段第一句“Water can be a liquid, a solid or a gas.(水可以是液体,固体或者气体。)”可知,物质的三种形态是“液体,固体、气体”,所以B项正确。 (2)【答案】B 【解析】题干的意思是“当云上升时可能发生什么? .”A.它们上升得越高,就被加热得越多;B.它们上升得越高,就被冷却得越多;C...
D Antifreeze is a liquid(液体) that is added to water to keep it from freezing. When water freezes and turns to ice, it expands(膨胀). The force of water expanding is so great that it will break the hardest metal. Water is used in car engines(发动机) to keep them cool while they ...
A.Trychallengingthings. B.Takeadegree. C.Bringbacklostmemories. D.Sticktoapromise. 9.WhatmadeGinnidecideonthetriptoAntarctica? A.Lovelypenguins. B.Beautifulscenery. C.Adiscountfare. D.Afriend?sinvitation. 10.WhatdoesGinnithinkaboutAntarcticaafter thejourney? A.Itcouldbeahomeforher. B.Itshouldbee...
he the wet coat.To his surprise, the area of the with rubber wasn’t wet.“Why not make a rubber raincoat ” Macintosh .The next day he brushed the rubber liquid all over his coat.He wore the “rubber coat” on days and took a walk outside to test if it could really keep off ...
当水结成冰的时候，它会膨胀。水膨胀的力很大，可以把最硬的金属涨破。这就是为什么在冬天汽车的引擎中加防冻液的原因。小题1:细节理解题。根据文章第一段三，四两行可知。小题2:细节理解题。根据文章第一段倒数第三行，四行可知。小题3:细节理解题。根据文章第一段倒数一二两行可知。小题4:细节...
(b) Why does water boil at a lower temperature up in the mountains than at sea level? Define boiling point in terms of vapor pressure. How are vapor pressure and boiling point related? At a given temperature, liquid A has a higher vapor pressure than liquid B. Which liqu...
Antifreeze is a liquid(液体) that is added to water to keep it from freezing.When water freezes and turns to ice,it expands(膨胀).The force of water expanding is so great that it will break the hardest metal.Water is used in car engines(发动机) to keep them cool while they run,and ...
Antifreeze is a liquid(液体) that is added to water to keep it from freezing. When water freezes and turns to ice,it expands(膨胀).The force of water expanding is so great that it will break the hardest metal.Water is used in car engines(发动机) to keep them cool while they run,and...
阅读下面短文.然后根据短文内容选择最佳答案. Water can be a liquid, a solid or a gas.When it is a solid, it may be as hard as rock.When it is a liquid, you can pour it out of a bottle.When it is a gas, you cannot see or pr feel it. Water can change f