九年级英语(上)第二单元重点必背unit2lovingourplanet67
九年级英语(上)第二单元重点必背unit2lovingourplanet67

九年级英语(上)第二单元重点必背unit2lovingourplanet67九年级英语(上)第二单元重点必背Unit 2 Loving Our PlanetTopic 1 Pollution causes too many problems.一单词bee, several, chemical---chemistry, waste, stream, soil, breathe----breath, influence, weak, create, produce---production, gas, chest, anyway, coal, electric----electricity, deaf, print, disturb, harm---harmful, nearby, effect, industry, rubbish, destroy, blood, pressure二短语my goodness 天啊 see sb. doing sth. 看见某人正在做某事pour …into … 把…倒入…several = some = a few 几个be harmful to 对…有害 do harm to 对…有害harm sb. / sth. 伤害某人/物 have an influence on 对…产生影响breathing problems 呼吸问题influence the look of the city 影响市容stand sb. doing sth. 忍受做某事 sleep well = have a good sleep 好好睡一觉quite a few / lot / bit 许多,大量 be in a good / bad mood 好心/坏心情hearing loss 听力丧失manage to dosth. 设法做某事(强调结果)in public 在公共场所had better (not) do sht. 最好(不要)做某事produce electricity by wind风力发电 all sorts of =all kinds of各种各样的 high blood pressure 高血压 no better than 同…一样(差)=almost as bad / badly as三重点句型1. All the flowers, grass and fish have gone! 2. Look, there are several chemical factories pouring waste water into the streams. 3. There be +sb. / sth. +doing sth. 有某人/物正在做某事There be + sb. / sth. + to do sth.4. Everything has changed. 5. What’s wrong with you?=What’s the matter/ trouble with you? 6. How long have you been like this? 7. Thechemical factory produces terrible gas. The bad air makes my chest hurt.8. What’s more, the factory makes too much noise and I can’t sleep well at night.9. I’m always in a bad mood because I can’t stand the environment here. 10. It causes breathing problems and even cancer. 11. It’s difficult for me to breathe.12. People who work and live in noisy conditions may go deaf.13. Quite a few people living near airports also have hearing loss.14. Nowadays many countries are trying to solve all sorts of environmental problems, including noise pollution. 15. Light pollution is harmful to our eyes. 16. Litter influences the look of our ci ties.17. It is said …18. It was reported …书面表达: Saving the Earth (112词) As time goes by, man is making the earth sick. People cut down too many trees and leave rubbish everywhere. Factories throw out their wastes without doing anything with them. This has caused some serious problems. For example, the land is sandy, the river is dirty, the air is less clean, even the temperature of the earth is rising. What should we do to save the earth? My suggestion is that we should plant more threes, put the rubbish into dustbins and stop factories pouring waste directly into the air or rivers. Ina word, we have only one earth, so we should do everything to protect it, or we’ll regret it.Topic 2 All these problems are very serious.单词recycle, rude, behavior, importance-important, sand, desert, prevent, although, law, escape, rise, level短语as a result 结果,由于 here and there=everywhere 到处,处处day by day 一天天,逐日in the beginning 一开始,初期just now 刚才prevent/stop sb. from doing sth. 防止某人做某事cut down 砍倒change into 转换成,把…变成cut off 切断 millions of 无数的,数以百万计的human beings 人类 the greenhouse effect 温室效应take away 拿走 come true=realize 实现(愿望、理想等)take up 占去,占据a lot of=lots of=a great deal of 很多的,大量的divide …into 把…分成… cause sb. to do sth. 引导/引起某人做某事as we know 众所周知come to realize 逐渐意识到be good / bad for 对…有益/害 be good at=do well in 擅长deal with (与how连用) 处理do with (与what连用) 处理重点句型1. The more, the better. 越多越好。
九年级英语上册unit2知识点汇总仁爱版

九年级英语上册unit2知识点汇总仁爱版九年级英语重点词组与句型Unit2Tpi1sell/sund/feel/taste/l+形容词闻/听/感觉/尝/看起来……2Therebesbdingsth有某人正在做某事3dhart…对……有害=beharfult/bebadfr4hat/Habutsth/Let’sdsth/Shalledsth?/hntdsth/hdn’tudsth提供建议pur…int…把……倒入……6see/hearsbding/dsth看/听见某人正在/在做某事7dsthusefultdsth=taeeasurestdsth采取措施做某事8Hlnghaveubeenliethis?你像这样有多久了?(回答用sine或fr短语)9aesbdsth使某人做某事0aenise制造噪音1hat’sre而且2beinagd/badd心情好/坏3standsth/ding忍受某事/做某事4anagetdsth努力做某事ritetsb给某人写信6hadbetterdsth最好做某事hadbetterntdsth最好不要做某事7ntall不是所有ntever不是每一个8quiteafe相当多9nbetterthan与……一样差,不比……好20ausesbtdsth导致某人做某事21trtdsth努力做某事22allsrts/indsf各种各样23ntnl……butals不仅……而且……24asell也(置于句末)2inanas在许多方面;以许多方式26Itisreprted/saidthat+从句据报道/据说Tpi227asaresult因此28leavesthsp把某物遗忘在某地29leavesthhereandthere乱扔……30aln踩踏31arefr关心,照顾=taearef/lafter32deverthingsbantdsth 尽某人最大努力做某事=tr/dne'sbesttdsth 33evenrse更糟糕的是34nnef代词/名词没有……3inthebeginning一开始36betterandbetter越来越好37dabda一天天38beindanger处于危险中39beindangerf面临……的危险40etrealize逐渐意识到41ustn现在,刚才42stp/eep/prevent…frdingsth 防止……做某事43needtdsth需要做某事44ash/blaa冲走/吹走4inpubli在公共场合46eintbeing形成47turnff/n/up/dn关掉/打开/调高/调低48dealith=dith处理解决49taeaa带走0blstrngl风刮得厉害1aldnthestreet在街上走2hangeint把……转换成8prtettheenvirnent保护环境64reeber/frgettdsth记得/忘记(不)做某事6bebad/gdfr对……有害/有益67refert提到/涉及68havediffiult/truble/prblesdingsth 有困难做某事69taeup占据Tpi370pisthup捡起某物71Hften多久一次72rfr为……工作73beusedfrding某物被用于做某事74taeasher淋浴7usesthtdsth用某物做某事76It’sapitthat+从句很遗憾……77enuragesbtdsth鼓励某人做某事78It’sindfsbtdsth 某人做某事好79besuppsedtdsth应该做某事80I’dlvet我乐意81ughttd应该做某事否定ughtnttd82insteadfding而不是做某事83ntie准时84intie及时8Thereillbesthtd 有某事要去做86aesuretdsth确定做某事87push…frard/dn 向前/下推……88pull…up向上拉……。
初三英语Unit2 Loving Our Planet. Topic 1 Pollution cau

初三英语Unit 2 Loving Our Planet. Topic 1 Pollution causes too many problems. (2)知识精讲湘教版(修订版)【同步教育信息】一. 本周教学内容:Unit 2 Loving Our Planet. Topic 1 Pollution causes too many problems. (2)二. 重点、难点:课文讲解三. 具体内容:Unit 2 Loving Our PlanetTopic 1 Pollution causes too many problems.A 1a Listen, read and say(Kangkang Jane, Maria and Michael are planning a piic.)Jane and Maria: Kangkang, where shall we go?Kangkang: What about West Hill? I’ve been there before. It’s a beautiful place with flowers and grass. The air is fresh, the water is clean and you will see bees and butterflies dancing.Michael: Sounds great. Let’s go there.(Two days later, they reach West Hill.)Kangkang: Oh, my goodness! All the flowers, grass and fish have gone! The water is so dirty. It smells terrible. What has happened here?Maria: Look, there are several chemical factories pouring waste water into the streams.Kangkang: Everything has changed.Michael: Do you still want to have the piic here?Jane: Of course not.B 1a Look, listen and sayGranny: (Cough)Kangkang: Good morning. Granny, you look so weak. What’s wrong with you?Granny: Oh, boy. It’s difficult for me to breathe.Kangkang: How long have you been like this?Granny: I’ve been like this since last month.Kangkang: That sounds terrible!Granny: The chemical factory produces terrible gas. The bad air makes my chest hurt. What’smore, the factory makes too much noise and I can’t sleep well at night.Kangkang: That’s too bad.Granny: I’m always in a bad mood because I can’t stand the environment here. Anyway, I’ll manage to leave this place.Kangkang: Oh, pollution causes too many problems. I think I should write to the newspaper about these problems. But now you’d better go and see a doctor.C 1a Read and understandPre-reading questions:1. Discuss these phrases and check(√)which is pollution.()(1)playing loud rock music at midnight()(2)burning wood, gas, oil and coal()(3)producing electricity by wind()(4)talking after class2. How many kinds of noise pollution do you know? Discuss them with your partner.In today’s world, almost everyone knows that air pollution is harmful to people’s health. However, not all people know that noise is also a kind of pollution and is harmful to human health.People who work and live in noisy conditions may bee deaf. For example, many of the workers who print newspapers and books bee deaf. Quite a few people living near airports also have hearing loss. Recently it was reported that many teenagers in America can hear no better than 65-year-old people do, because these young people always listen to loud pop music. Making a loud noise in public is also a kind of pollution; it not only disturbs others but also does great harm to hearing. Cars and machines also produce too much noise. Such pollution makes people feel unfortable and unpleasant, and it can even cause them to bee sick or deaf.Nowadays many countries are trying to solve all sorts of environmental problems, including noise pollution.D 1a Read and understandFill in the blanks with the words and phrases below.greener such as cause breathing deaf illnesses pleasant feel terrible noisy diseases as well chemicals There are many kinds of pollution around us, ___1___air pollution, soil pollution, noise pollution and light pollution. They are bad for our health in many ways.Burning gas, oil and coal creates air pollution. It can ___2___sore eyes and ___3___problems.With the increase of population and the development of industry, litter is everywhere. It makes our environment dirty. People put lots of rubbish into the land. Farmers use too many ___4___in the fields. They destroy the soil. So soil pollution has bee serious.Noise pollution can make people ___5___. For example, people may lose their hearing if they work in a ___6___place for a long time. Too much noise can cause high blood pressure ___7___.Working for a long time in strong, changeable light may cause some kinds of ___8___. It makes people ___9___and is especially bad for the eyes.With less pollution, our planet will bee ___10___and our health will be better. Le t’s be greener people.【典型例题】week 是一段时间,故谓语动词用延续性动词be open,故选A。
九年级英语上册Module2知识点总结(外研版)

九年级英语上册Module2知识点总结(外研版)九年级英语上册dule2知识点总结(外研版)dule 2 Unit 1知识点1 怎么了?发生了什么?hat’s up? =hat happened t sb?=hat’s rng ith sb? =hat’s the atter ith sb?2 l fr 寻找,强调找的动作;find找到,发现,强调找的结果find ut查找,指经过观察、探索、查询而弄清楚情况或发现某物disver 发现,发觉,发现早已存在(还未被发现)的东西invent 发明,指发明创造以前没有的东西。
I as ling fr b at that tie and at last, I fund ite ust find ut the truth lubus disvered AeriaEdisn is an inventr, he invented a nuber f inventins3 get sth right 正确理解某事4 as far as 就…说as far as I n/reeber 据我所知/记得nt …an re = n re 不再…e dn’t have a agazine an re =e have agazine n re6 thin f 想到,想起,认为thin abut 认真考虑(计划等是否可行)hat d u thin f the b? = hat’s ur pinin f the b?I ill thin abut ur suggestin 写日记eep a diar7 继续做另一事g n/ntinue t d 继续做原的事g n/ntinue ding8 dail 每日一次的eel 每周一次的nthl 每月一次的earl 每年一次9 数百万的illins f ;hundred, thusand, illin, billin 前面有具体数字用单数,与f连用用复数100 illin ;4321 billin ;thusands f rs10例如:fr exaple 后举一个例子suh as 后至少两个例子11 以/因…而著名be nn/ faus fr; 作为…而著名be nn/ faus as Hangzhu is nn fr est Lae La She is nn as a great riter12 in fat= atuall 事实上,实际上13 ae 做,制作;使成为hat aes a great riter?什么成就一名伟大的作家?14 agree ith sb 同意某人或某人的话;与…一致agree t d 同意做某事拒绝做某事refuse t d 计划做某事plan t d 想要做某事uld lie t d1run aa 逃跑put aa 把…收好/放好thr aa 扔掉,浪费give aa 分发,泄露g aa 走开send aa 解雇far aa fr 远离…;离… 远tae aa拿走16 看起像l lie 听起像l lie 似乎,好像as if 即使even thugh17 r 工作(不可数);作品(可数且常用复数名著great s)18 迷路get lst ;be lst His sn gt lst esterda19 后缀--ed 形容词,通常用形容人interested;exited, pleased, surprised, rried;后缀—ing形容词,通常用形容事物interesting, exiting, pleasing, surprising, rringbe interested in sth;be exited at/abut/b; be pleased ith/ t d; be surprised at/20 照顾,照料l after= tae are f as…as和…一样as heap as 和…一样便宜21 我明白了。
初三上册二单元重点

Unit 2重点归纳1.不让……进入keep out2.遮挡阳光keep out the Sun3.除了except..but..besides4.我们除了学语文,还学数学。
We study math besides Chinese.5.除了周六和周日,我们每天都上学。
We go to school every day except= (but) Saturday and Sunday.6.除了我之外班上其他的每个人都被邀请了。
Everyone else in my class was invited except me.7.别的,其他的other(adj)else(adv)8.其他的男孩other boys9.别人somebody else10.你还能看到什么?What else can you see?11.播放大声的音乐play the CDs too loud12.和……吵架argue with sb=have an argument with sb13.你不应该和父母争吵。
You shouldn’t argue with your parents.14.给他写封信write him a letter=write a letter to him=write to him15.怎么了?What’s wrong? = What’s the mater? = What’s the trouble?16.不时髦的out of style17.时髦的in style18.你的衣服过时了。
Your clothes are out of style.19.打电话给……call sb up = call sb = ring sb = ring sb up =telephone sb = make a telephone call to sb =give sb a call20.一张球赛票 a ticket to a ball game21.用电话交谈on the phone22.我不想通过电话谈论此事。
九年级上册英语unit2知识点

九年级上册英语unit2知识点九年级上册英语 Unit 2 知识点在九年级上册的英语教材中,Unit 2 是一个相对重要的单元,其中包含了许多重要的知识点。
在本文中,我们将一一介绍这些知识点,并逐步深入了解它们。
首先,本单元主要涉及到的是关于世界各地的食物和饮料的讨论。
学生将会学习如何使用英语描述不同国家的特色美食和当地的饮食文化。
通过学习这些内容,学生们将能够扩展他们的词汇量,并提高他们的口语表达能力。
接下来,我们将详细介绍一些重要的语法知识点。
首先是比较级和最高级的用法。
学生们需要了解如何使用 "比较级 + than" 和 "最高级 + in" 的结构,来进行比较和描述事物的优劣。
例如,学生们可以学习如何用比较级来描述不同食物的口感或香味,并用最高级来描述他们最喜欢的食物。
另一个重要的语法知识点是现在完成时的用法。
学生们需要了解如何使用 "have/has + 过去分词" 的结构来表达过去发生的动作对现在造成的影响。
通过练习现在完成时的使用,学生们将能够更好地描述他们的个人经历以及他们对食物和饮料的喜好。
此外,学生们还将学习如何使用情态动词来表达请求、建议和推测。
例如,他们将学习如何使用 "Can you...?" 或 "Could you...?" 来请求别人帮助。
他们还将学习如何使用 "You should..." 来提出建议,并使用 "It might be... " 或 "I think ..." 来进行推测。
在本单元中,学生们还将学习如何使用虚拟语气来表达与现实相反的假设。
他们将学习如何使用 "If" 来引导虚拟条件句,并使用 "would" 或 "could" 来表达与现实相反的情况。
九年级上英语unit2知识点

九年级上英语unit2知识点九年级上英语Unit 2 知识点我们知道,在学习英语的过程中,学习单元的知识点是非常重要的。
只有掌握了每个单元的重要知识点,才能在学习中事半功倍,更加有效地提高我们的英语水平。
那么,让我们来看一下九年级上英语Unit 2的知识点吧。
首先,我们来讨论一下单元的主题——家庭。
这是一个非常有趣的主题,因为家庭在我们生活中占据着重要的地位。
在这个单元中,我们将学习如何描述家庭成员以及他们的特点。
在这个单元中,我们要学习一些基本的家庭成员的词汇,比如父母、兄弟姐妹等。
同时,我们也需要学习如何用英语来描述他们的特点。
比如,我们可以用“kind”来形容一个人很友善,用“funny”来形容一个人很搞笑等等。
除了学习描述家庭成员的词汇和表达方式,我们还需要学习如何用英语来进行简单的家庭成员之间的对话。
在这个单元中,我们将学习一些常用的对话句子,以及如何回答一些有关家庭的问题。
比如,“Do you have any brothers or sisters?”(你有兄弟姐妹吗?)我们可以用“Yes, I have a younger brother.”(是的,我有一个弟弟)来回答。
在学习这些对话的过程中,我们还需要学习一些特殊疑问句,比如,“How many people are there in your family?”(你家里有几口人?)我们需要知道如何正确地构造这些问句,并且能够正确地回答它们。
另外,这个单元中还包括一些与家庭成员相关的常见动词的学习,比如“look after”和“take care of”。
通过学习这些动词,我们可以了解到在家庭中,家人们如何相互照顾和关心。
在这个单元的学习中,我们还将学习到一些关于家庭成员的形容词的比较级和最高级的表达方式。
通过学习这些语法知识,我们可以更好地描述家人之间的关系。
比如,“My mother is older than my father.”(我妈妈比我爸爸大)。
九年级英语上册Unit2LovingOurPlanet单元词组归纳试题

Unit 2 Loving Our PlanetUnit 2 Topic 1短语1. at present 目前2. have a picnic 野餐3. of course 当做4. be harmful to 对……是有害的5. in a bad mood 处于坏情绪6. manage to do sth 设法做某事7. at midnight 在午夜8. do harm to 有害于9. go deaf 变聋10. quite a few 相当多11. no better than 与……一样〔差、坏〕12. in public 在公一共场合13. cause sb to do sth 导致某人做某事14. all sorts of 各种各样的15. in many ways 在许多方面16. for example 举个例子17. have an effect on sth 对某事有影响18. two days later 两天后19. in the past 在过去20. at the end of 在……的末尾Unit 2 Topic 2短语1.as a result 结果2.here and there 到处3.walk on grass 践踏草坪4.care for 关心;照顾5.pick flowers 摘花6.give some advice to 给……一些建议7.in the beginning 在开端8.cut down 砍伐9.prevent sb from doing sth 阻止某人做某事10.in danger of 处于……的危险中e to do sth 开场做某事12.day by day 一天天13.follow the rules 遵守规那么e into being 形成15.cut off 切断16.change into 变成……17.take away 带走18.pass through 通过;穿过19.be helpful to 对……是有帮助的;有助于……20.refer to 指的是……21.deal with 处理22.at the same time 同时23.take up 占据24.stop sb from doing sth 阻止某人做某事25.wash away 冲走Unit 2 Topic 3短语1.interview sb about sth 采访某人某事2.spread the message 传递信息3.encourage sb to do sth 鼓励某人做某事4.protect the environment 保护环境5.save money 钱6.be supposed to 理应;应该7.ought to 应该8.travel a short distance 短途旅行9.make sure 确保10.on time 准时11.make an announcement 发个口头通知12.turn off 关掉13.work hard 努力工作〔学习〕14.hurry up 快点;赶快15.instead of 代替16.of course 当然17.fail the exam 考试失败18.take part in 参加19.be used for 被用作……20.turn green 变绿;变得环保励志赠言经典语录精选句;挥动**,放飞梦想。
- 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。
九年级英语(上)第二单元重点必背Unit 2 Loving Our PlanetTopic 1 Pollution causes too many problems.一单词bee, several, chemical---chemistry, waste, stream, soil, breathe----breath, influence, weak, create, produce---production, gas, chest, anyway, coal, electric----electricity, deaf, print, disturb, harm---harmful, nearby, effect, industry, rubbish, destroy, blood, pressure二短语my goodness 天啊 see sb. doing sth. 看见某人正在做某事pour …into … 把…倒入…several = some = a few 几个be harmful to 对…有害 do harm to 对…有害harm sb. / sth. 伤害某人/物 have an influence on 对…产生影响breathing problems 呼吸问题influence the look of the city 影响市容stand sb. doing sth. 忍受做某事 sleep well = have a good sleep 好好睡一觉quite a few / lot / bit 许多,大量 be in a good / bad mood 好心/坏心情hearing loss 听力丧失 manage to dosth. 设法做某事(强调结果)in public 在公共场所 had better (not) do sht. 最好(不要)做某事produce electricity by wind风力发电 all sorts of =all kinds of各种各样的 high blood pressure 高血压 no better than 同…一样(差)=almost as bad / badly as三重点句型1. All the flowers, grass and fish have gone! 2. Look, there are several chemical factories pouring waste water into the streams. 3. There be +sb. / sth. +doing sth. 有某人/物正在做某事There be + sb. / sth. + to do sth.4. Everything has changed. 5. What’s wrong with you?=What’s the matter/ trouble with you? 6. How long have you been like this? 7. The chemical factory produces terrible gas. The bad air makes my chest hurt.8. What’s more, the factory makes too much noise and I can’t sleep well at night.9. I’m always in a bad mood because I can’t stand the environment here. 10. It causes breathing problems and even cancer. 11. It’s difficult for me to breathe.12. People who work and live in noisy conditions may go deaf. 13. Quite a few people living near airports also have hearing loss. 14. Nowadays many countries are trying to solve all sorts of environmental problems, including noise pollution. 15. Light pollution is harmful to our eyes. 16. Litter influences the look of our cities.17. It is said …18. It was reported …书面表达: Saving the Earth (112词) As time goes by, man is making the earth sick. People cut down too many trees and leave rubbish everywhere. Factories throw out their wastes without doing anything with them. This has caused some serious problems. For example, the land is sandy, the river is dirty, the air is less clean, even the temperature of the earth is rising. What should we do to save the earth? My suggestion is that we should plant more threes, put the rubbish into dustbins and stop factories pouring waste directly into the air or rivers. Ina word, we have only one earth, so we should do everything to protect it, or we’ll regret it.Topic 2 All these problems are very serious.单词recycle, rude, behavior, importance-important, sand, desert, prevent, although, law, escape, rise, level短语as a result 结果,由于 here and there=everywhere 到处,处处day by day 一天天,逐日 in the beginning 一开始,初期just now 刚才prevent/stop sb. from doing sth. 防止某人做某事cut down 砍倒change into 转换成,把…变成cut off 切断 millions of 无数的,数以百万计的human beings 人类 the greenhouse effect 温室效应take away 拿走 come true=realize 实现(愿望、理想等)take up 占去,占据 a lot of=lots of=a great deal of 很多的,大量的divide …into 把…分成… cause sb. to do sth. 引导/引起某人做某事as we know 众所周知come to realize 逐渐意识到be good / bad for 对…有益/害 be good at=do well in 擅长deal with (与how连用) 处理do with (与what连用) 处理重点句型1. The more, the better. 越多越好。
2. China has become the world’s largest producer and user of coal. 3. The government has done something useful (=taken measures) to protect the environment.4. As we know, none of us likes pollution. 众所周知,我们中没有人喜欢污染。
5. Air pollution has become a serious problem. 。
6. What should we do as students? 作7. We shouldn’t leave rubbish here and there. Don’t spit everywhere. Don’t step on the grass and pick the flowers.,8. Everyone should care for wild animals and plant more trees.9. Trees can stop the wind from blowing the earth away.。
10. Trees can also prevent the water from washing the earth away. 11. A lot of water can be saved by forests.。
12. We should do everything we can to protect the environment.。
13. We should do everything we can to protect the environment. (We should try/do our best to protect the environment.)14. If everyone does their best to follow the rules, our school will become better and better day by day. 15. I can’t see anything. =I can see nothing. 16. Cutting down trees is harmful to human beings, animals and plants.17. Stop factories pouring waste water into rivers by cutting off their water supply.18. I’m sorry to hear that. 19. Water is very important to human beings, but not everybody knows how to save it. As a student, what should we do? 20. Remember to turn the tap off when you leave. 21. Humans have come to realize the importance of protecting animals. 22. What does … mean here?…书面表达 (对环保的看法)(1)空调和汽车增加,排出大量废气;(2)森林减少,风沙变大,气候更加干燥;(3)河流污染,城市供水不足。