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1、必修3,Unit 4Astronomy：the science of the stars,题组冲关,基础自测,考点研析,课时作业,研,.重点单词1_ n. 系统；体系；制度2_ n. 学说；理论3_ n. 大气层；气氛4_ adj. 基本的；基础的5_ adv. 因此；于是6_ vt. & vi. (使)迷惑；(使)为难 n. 谜；难题7_ adj. 温和的；文雅的,8_ vi. & vt. 碰撞；坠落9_ n. & vt. 拉(力)；拖；牵引力10_ vi. & vt. (使)浮动；(使)漂浮 n. 漂浮物11_ vi. 繁殖，增加12_ adj. 猛烈的；激烈的；强暴的_ n. 暴力_ a
2、dv. 暴力地；猛烈地13_ prep. 不同；不像_ vt. 喜欢；prep. 相像的_ adj. 可能的,14_ adj. 有害的_ n. & v. 伤害_ adj. 无害的15_ vi. 存在；生存_ n. 存在；生存,答案1system2.theory3.atmosphere4.fundamental5thus6.puzzle7.gentle8.crash9.pull10float11.multiply12.violent; violence; violently13unlike; like; likely14.harmful; harm; harmless15exist; exist
3、ence,.重点短语1_ time 及时；终于2_ eggs 下蛋3give birth _ 产生；分娩4_ ones turn 轮到某人；接着5prevent. _ 阻止；制止6cheer _ 感到高兴；感到振奋7get the hang _ 熟悉,8break _ 突发；爆发9watch _ 密切注视；当心；提防10block _ 挡住(光线)答案1in2.lay3.to4.in5.from6.up7.of8out9.out10.out,1pull n. & vt. 拉(力)；拖；牵引力We waved as the train pulled out of the station.火车驶出
4、车站时我们挥手告别。pull apart 拆开；拆散pull away (汽车等)开走pull down 拆毁；摧毁 pull in (车辆)进站pull out 驶出；退出 pull over 向路边停靠；驶向路边pull up 停车,解析：pull out 驶出车站。答案：D,2exist vi.存在；生存The technology for performing this operation already exists.做这种手术的技术早已存在。,exist in 存在于之中exist on 靠为生exist by 靠生存There exist. 有；存在着come into exis
5、tence 开始存在；成立bring. into existence 使发生；产生,解析：There used to exist 过去有。答案：C,3puzzle n谜；难题 vt.(使)迷惑；(使)为难What puzzled me is why they didnt take her advice.他们为何不接受她的忠告，这使我大惑不解。in a puzzle 疑惑；困惑puzzle over 冥思苦想puzzle out 苦苦思索而弄清楚be puzzled 感到困惑be puzzling 令人困惑的,解析：puzzling 令人迷惑的，修饰物； puzzled 迷惑的，修饰人。答案：B
6、,4mass n质量；团；块；大量Her garden is a mass of flowers.她的花园里种满了花。a mass ofmasses of 大量的；许多的in the mass 大体上；大致上the masses 大众；民众the mass of. 大部分,a mass of 和 masses of 后面可以接可数或不可数名词，作主语时谓语动词的单复数与 mass 的单复数保持一致。,解析：a mass of 大量的，既可以修饰可数名词也可以修饰不可数名词。B、D两项修饰可数名词；A项本身有误。答案：C,5spread vt.伸展；传播；蔓延He spread a cloth
7、on the table.他把台布铺在桌子上。The fire spread from the factory to the houses nearby.火势从工厂延烧至附近的房舍。,spread out 散开；伸展；延伸spread over 遍布在spread (from.) to (从)传到，波及到spread oneself 舒展四肢(躺下),解析：spread 传播。句意：Steve Jobs的死迅速传播很快成为全世界的谈话主题。express 表达；perform 表演；whisper 耳语。答案：B,6depend vi.依靠It depends on how you solve
8、 the problem.那取决于你如何解决这个问题。depend on sth./sb.rely on 依靠或依赖某人/某物depend on sb. to do sth. 依靠某人做某事That depends. 视情况而定。It all depends. 视情况而定。live on 以为主食；靠生活feed on (动物)以为饲料,解析：that depends 那依情况而定。答案：D,7disappoint vt. 使失望Dont disappoint me by being late again.别再迟到了，不要叫我失望。,disappoint sb. 使某人失望disappoint
9、 a hope/plan 希望/计划落空disappointed adj. 失望的disappointing adj. 令人失望的disappointment n. 失望；令人失望的人或事to ones disappointment 令某人失望的是,解析：第一空用surprising 修饰物；第二空用 disappointed修饰 look。 答案：D,8method n方法，办法；秩序，条理We should go over our lessons with methods.我们应该系统地复习功课。with this method 用这种方法method of/for (doing) sth
10、. 做的方法,解析：with this method 相当于in this way 或 by this means，意为“用这种方法”。答案：C,9harmful adj. 有害的，其反义词为harmlessIts harmful to your eyes to read in the sun.在阳光下看书对你的眼睛有害。The medicine is harmful to children but does no harm to adults.这种药对儿童有害，却对成年人没有什么害处。,As far as Im concerned, there is no harm in making an
11、 apology to him first.就我个人而言，先向他道歉没有什么坏处。,解析：be harmful to 对有害。答案：A,10atmosphere n. 大气，大气层；空气/气氛，情绪The atmosphere is very stuffy.空气很沉闷。The party was held in a cozy atmosphere.宴会在令人舒适的气氛中举行。,解析：atmosphere 气氛。句意：两国领导人在友好的气氛中举行会谈。答案：A,11presence n. 出席，在场What many scientists believe is that the continue
12、d presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas.许多科学家相信，由于地球上长期有水存在，使地球得以把有害气体和酸性物质溶解在海洋里。,in the presence of sb.in sb.s presence 当着某人；有某人在场lose ones presence of mind 心慌意乱present adj. 出席的，在场的；现在的，当前的absence n. 缺席，不在场absent adj. 缺席，不在场的absentminded a
13、dj. 心不在焉的be absent from school/work/a meeting 不上学/不上班/不到会,解析：in the presence of sb. 当着某人。答案：A,12encourage v. 鼓励，鼓舞/激励，促进They multiplied and filled the oceans and seas with oxygen, which encouraged the later development of early shellfish and all sorts of fish.它们成倍增加，使海洋里充满了氧气，这也促成了后来早期贝类及各种鱼类的发展。,en
14、couraging adj. 令人鼓舞的encouragement n. 鼓舞，鼓励courage n. 勇气discourage vt. 使泄气(discourage sb. from doing sth.),解析：be encouraged to do sth. 被鼓励做某事。答案：B,13force n. 力，力量；暴力，武力；部队 vt. 强迫Before we left, Li Yanping explained to me that the force of gravity would change three times on our journey. 在我们离开之前，李燕萍解释
15、说旅途中引力将变化三次the force of the explosion 爆炸力by force 用暴力，用武力the air force 空军,force sb. to do/force sb. into doing 强迫某人做force ones way 强行前进put.into force 使生效come into force 生效，实施in force 生效，在实施中；大批，众多force the door open 强行打开门force a smile 勉强一笑,解析：force sb. to do sth. 迫使某人做某事。答案：B,1cheer up 感到高兴；感到振奋Try and cheer up a bit; life isnt that bad.试着高兴一点；生活并不是那样糟糕。,
