今年春季，当天气突然变暖时，有时会发现地面上、黑板上会“冒汗”，这是什么现象（）A．液化B．汽化C．升华D．凝华-物理

更多内容推荐

• (C)Many people often say there is more stress in today's society than in years past. In fact,
• BIf you have a bottle of water recycled from urine(尿), would you drink it? Astronauts at the ISS may
• 冬天，地处北部山区的一些居民，为了室内的保温，常把纸条粘在窗缝处，俗称“溜窗缝”．为了使纸条不因潮湿而脱落，通常把纸条粘在室外的窗缝处．请你用学过的物态变化知识解释：-物理
• E Here is a passage about learning a foreign language. Outside of class, the most natural way of fin
• HK's Family Affair The 39th Hong Kong Art Festival, to be held early next year, will be based o
• 下列说法正确的是（）A．比热容跟物体质量有关，质量越大，比热容越小B．固体和液体都很难被压缩说明分子间存在斥力C．霜是由空气中的水蒸气直接变成固体冰晶，是一种液化现象D．舞-物理
• PART THREE READING COMPREHENSIONDirections: Read the following three passages. Each passage is follo
• Many immigrants(移民) to the United States find the decision to seek better lives for their families i
• DA mysterious machine found in a 2,000-year-old Greek shipwreck may have been used to calculate the
• (B)People can be addicted to different things — e.g. alcohol, drug, certain foods, or even televisio
• 下列物态变化现象中，属于液化的是（）A．春天，河里的冰逐渐变成水B．夏天，剥开冰棒的包装纸，会看到“白气”C．洒在教室地面上的水慢慢变干D．放在电冰箱冷冻室中的矿泉水结成了冰-物理
• BSome schools in the United States offer Chinese language classes with government support from China
• 第三部分阅读技能（共三节，满分35分）第一节阅读理解（共12小题；每小题2分，满分24分）阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂-英语
• People have long debated the essence（本质）of human nature．Some people think humans areborn good．In San
• Tom Becker has won the 2007 Waterstone's children's book prize with his first novel, Darks
• 下列物态变化中，不属于液化的过程是（）A．工厂里铁块变成铁水B．清晨路边的花瓣上出现露珠C．从冰箱刚拿出来的饮料瓶外面湿漉漉D．冬天讲话时人开口呵出“白气”-物理
• Some of the United States’ biggest banks have closed their doors to students at community colleges,
• D It is hard to predict（预言）how science is going to turn out, and whether it is really good science,
• 小明观察到一些与罐装“可乐”饮料有关的现象，下列说法正确的是（）A．“可乐”的铝制包装外壳是导体B．一罐“可乐”的质量约为100gC．拉开拉环时，气休膨胀对外做功，机械能转化为内能-物理
• 下列现象中不属于液化的是（）A．寒冷的冬天，人在呼吸时口中呼出“白气”B．深秋的早晨出现大雾C．夏天自来水管壁上常有水珠D．春天来了，冰冻的河面开始“解冻”-物理
• 关于厨房里的物理现象，下列说法不正确的是（）A．做饭时锅盖内表面会有许多小水珠，这是水蒸气液化形成的B．烧水时被水蒸气烫伤比沸水烫伤更严重，因为水蒸气液化吸热C．煤气燃烧-物理
• 人工降雨时，撒布在云中的干冰（固体二氧化碳）可使云中的水蒸汽变成水滴，形成降雨．水蒸汽变成水滴的物态变化是（）A．凝华B．凝固C．液化D．熔化-物理
• 第二部分:阅读理解(共20小题；每小题2分,满分40分)阅读下面短文,从A、B、C、D四个选项中,选出最佳选项。A How Americans Began to Eat TomatoesPeople
• 小丽善于观察身边的物理现象．一天，她从冰箱的冷冻室中拿出一支冰棍，发现冰棍包装纸上附着白花花的“粉”；剥去包装纸，看见冰棍在冒“白气”．请你帮小丽解释“粉”和“白气”分别是-物理
• 阅读理解。 As financial crisis today claimed more victims this week on Wall Street, the rest of the world
• C Members of Parliament (MPs) warned that the privacy（隐藏）of thousands of mobile phone users is in da
• 春秋季节，晚自习时教室窗玻璃的______侧（选择“内“或“外“）会出现一些水珠，它是由______（选填“教室内”或“教室外”）的水蒸气发生______而形成的．-物理
• …… This election had many firsts and many stories that will be told for generations. But one that&#
• 第三部分：阅读理解：（共20小题；每小题2分，满分40分）阅读下列短文，从每题所给的四个选项中，选出最佳选项。 (A)What makes a house a home? A home is a pl
• C8:30 PMOutlookOutlook is back with a new series of reports to keep you up date with all that’s new
• 用电热壶烧水时，水沸腾后，从壶嘴里冒出“白气”；夏天打开冰棒纸时，可以看到冰棒周围也出现“白气”，以下说法正确的是（）A．壶嘴里冒出的“白气”，是水沸腾时产生的水蒸气B．冰棒-物理
• （C） Bali is a tiny island that is part of Indonesia(印度尼西亚) today. It is a pretty island that has man
• CA villa (别墅) designed to resist earthquakes with “self-healing” cracks in its walls, thanks to nano
• BFaced with a tough job market, fresh graduates are dreaming of running their own businesses instead
• 下列对家用电器的描述中正确的是（）A．家庭电路中，各用电器都是串联的B．用久了的白炽灯发光变暗是因为额定电压变小C．电饭锅是利用电流的热效应来工作的D．家用空调制冷过程不涉-物理
• 第二部分阅读理解（共20小题，每小题2分，满分40分）AWatching television more than two hours a day early in life can lead to
• 重庆永川城市内兴建了三大人工湖，为“森林城市”建设增添色彩，具有“吸热”功能，盛夏时能大大减弱周围地区的“热岛效应”．清晨荷叶上凝结有来回滚动露珠，湖水中金鱼在荷叶下游-物理
• BDave needed to prepare for Saturday's fishing trip. He went into his hall closet, where he had
• 第三部分：阅读理解（共15小题；每小题2分，满分30分）请认真阅读下列短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。A Around the ag-英语
• 某奥体中心内的管道，分布在地下二千多口的100m深井和温度基本恒为18℃的百米地下形成一个水循环热交换系统．夏天，系统将地上奥体中心内与室温相同的水送到地下，放热、降温后-物理
• Ⅳ、阅读理解（每小题2分; 满分30分） ABeijing’s markets will soon be flooded with more and cheaper colorful fruit su
• Ⅲ、完形填空(每小题1.5分，满分30分)It was the last day of the final examination in a large eastern university. On
• 阅读理解 AWhen some plates of the earth move suddenly, an earthquake happens. Many earthquakes begin und
• 舞台经常喷洒干冰制造白雾以渲染气氛，关于白雾的形成，解释是：（1）干冰升华吸热，使周围环境温度降低：（2）气态二氧化碳液化形成白雾．你认为以上两句解释是否正确？如不正确，请-物理
• E Every year farmers in areas which often suffer flood in Southeast Asia lose millions of tons of ri
• 喜欢观察与思考的小强同学发现，夏天放在汽车驾驶室内块状的巧克力很容易就变为液体状了，聪明的他于是将密封好的液态状的巧克力放进冰箱冷冻室，一段时间后拿出，巧克力又恢-物理
• D ●Tower Bridge is one of London’s most well known landmarks. Opened in 1894, this hydraulic(液压的) br
• D Around half of all teenagers in the UK are putting themselves at risk of food poisoning because th
• E It is difficult in the modern world to do anything other than a basic job without being able to re
• 水被加热烧开后，水面上方有“白色气体”；在炎热的夏天，冰块的上方也有“白色气体”（）A．前者主要是由杯中的水转变成的“水的气态物质”B．后者主要是由冰转变成的“水的气态物质”C-物理