牙科医生用来观察病人牙齿的小镜子，要放在火上烤一下才放进病人的口腔中，医生这样做是为了[]A．消毒，防止将病毒带入口中B．把镜面上的水分烘干C．避免病人感觉镜子冷D．防止口-八年级物理

更多内容推荐

• In tough economic times, school counselors (顾问) don’t just wait for students to come to their office
• 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(A、B、C和D)中，选出最佳选项，并在答题卡上将该项涂黑。 ADo you enjoy reading-
• 第三节完形填空：（共20小题，每小题1.5分，满分30分）阅读下面短文,掌握其大意,然后从21-40各题所给的四个选项(A、B、C和D)中,选出最佳选项。 A young student was on
• C For a girl who's interested in fashion, what would be the dream job for success? Being a mode
• B Many people say that the United States is a paradise for the children, a struggling field for the
• EShould struggling students be banned from clubs and sports?Getting a bad grade in Rockingham, Vt. c
• BDon't believe all of the stereotypes (模式化的形象) you may have heard about Americans．Even the ones
• 夏天打开冰箱门，常可看到冷冻室里冒出一股白雾，这是：[]A、冰箱里原有的水蒸气凝结成的小水滴B、冰箱内食物中的水分遇到高温空气后，蒸发形成的水蒸气C、空气中的水蒸气降温-九年级物理
• CParis has the Eiffel Tower; New York has the Statue of Liberty; and Brussels, the MannekenPiss.Thin
• BUnfortunately, concerned about instability in the job market, many students are worried about facin
• 李秋同学在厨房帮妈妈做饭时观察到了一些现象，并用所学物理知识进行了解释，其中解释错误的是（）A．打开电冰箱时冒出的“白烟”，是冰箱内蔬菜水果等蒸发产生的水蒸气B．高压锅做-物理
• CSuperCampThe success of SuperCamp in the US has encouraged a worldwide demand for international sum
• 将经过冷冻的瓶装矿泉水从冰箱中取出后，发现瓶子的外表面附着了一层小水滴，其物态变化过程正确的是（）A．液化放出热量B．熔化吸收热量C．凝华放出热量D．升华吸收热量-物理
• B In this age of cell phones, text messages and computer keyboards, one Scottish school has returned
• COf all the websites，one that has attracted attention recently is myspace.com．Most of this attention
• DSure, it’s good to get along with your teacher because it makes the time you spend in the classroom
• BSingapore’s public transport system is one of the best in the world, so you should have no problem
• 完形填空（共10小题；每小题1分，满分10分）阅读下面短文，掌握其大意，然后从第30至第40小题所给的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。Would you -英语
• With the start of BBC World Service Television, millions of viewers in Asia and America can now watc
• 夏天自来水管上常出现水珠，这是因为发生了（）A．熔化现象B．液化现象C．凝华现象D．蒸发现象-物理
• 厨房中有很多物理知识．某天妈妈在厨房炖鸡汤，小华还没进门就闻到了鸡汤的香味，这种现象表明分子在______；小华打开炖鸡汤的锅盖，锅上会冒出“白气”，这些“白气”实际上是水-物理
• President Barack Obama has apologized for a gaffe (失言) in which he described his bowling skills as a
• 第二部分阅读理解（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列四篇短文，从每小题后所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该选项-英语
• 夏天天气炎热，小明从电冰箱冷藏室中取出一瓶冰凉的饮料放一玻璃茶几上．过一会儿，小明发现饮料瓶外侧有水珠并落在茶几上，他用抹布擦试，发现茶几上面的水擦干了，但茶几下-物理
• 第三部分：阅读理解（共15小题；每题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, 并在答题纸上将该项涂黑。APerhaps you have-英
• 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
• 完形填空 (共20小题；每小题1.5分，满分30分)Travel in most of Europe is easy. An agreement between the 15 European Uni
• (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