2020年中考化学专题训练第一单元走进化学世界（含解析）
2020年中考化学专题训练第一单元走进化学世界（含解析）,走进化学世界,莲山课件.
Units 13-14
Ⅰ.单项选择
( A )1.To everyone’s surprise,their plan is exactly the same as .(2019抚顺)
A.ours B.we
C.our D.us
( D )2.—Could you tell me how I can improve my English?
—Sure. ,you could speak it as much as possible.(2019本溪)
A.After all B.In the end
C.By the way D.First of all
( B )3.—Lucy,when you leave the room,please the light.
—OK,Mom.(2019菏泽)
A.put off B.turn off
C.turn up
( B )4.—After the big exams,we can finally have a good relax.
—How I a chance to have a trip! I can’t wait.(2019山西)
A.am worried about B.am thirsty for
C.am good at
( C )5.—Jeff,could you tell me if it tomorrow?If it tomorrow,I will stay at home.
—It’s reported that it will be sunny,let’s go camping on the Fenghuang mountain.(2019达州)
A.rain;rain B.rains;rains
C.will rain;rains D.will rain;will rain
( C )6.A little wine will not be to your health.Just don’t drink too much.
A.helpful B.helpless
C.harmful D.harmless
( A )7.My teacher has given me useful suggestions and I want to thank him from the of my heart.
A.bottom B.condition
C.way D.surface
( C )8.—Many wild animals are in great danger.
—Let’s to save them.
A.take off B.take down
C.take action D.take after
( A )9.As students,we should ourselves.We can’t spend much time playing computer games.
A.be responsible for B.be proud of
C.be popular with D.be thankful to
( D )10.—We have won the first prize in the singing competition!
— .(2019河池)
A.Have a good trip B.Wait a moment
C.Never mind D.Congratulations
Ⅱ.完成句子
11.你能好好利用时间吗?(2019本溪)
Can you make good use of your time/put your time to good use ?
12.在扔掉废物前进行分类是必要的。(2019烟台)
It’s necessary to divide the waste into different kinds before we throw it away .
13.如果你在考试中保持冷静,就会考出好成绩。(keep)(2019黄冈)
If you keep (your)cool/keep calm in the exam,you will get good grades.
14.我将亲手制作卡片,感谢母亲为我所做的一切。 (2019宜宾)
I’ll make a card myself to be thankful to my mother for what she has done for me.
15.和朋友们分离我感到很难过。
I feel very sad to separate from friends.
Ⅲ.完形填空
I finished middle school in the 1970s.I still remember the teen years were the 16 time of my life.At that time,as a girl,I hated it when my parents asked me 17 about my problems that made me uncomfortable.I also remember many times when Mr.Templat,my teacher,would take me aside and talk to me.He had a special way of finding out what the problem was.Every time he 18 with me,I felt better.He was a teacher I will never 19 .
He had a way of making his classes enjoyable.We always got the highest 20 in math in our grade with his teaching.If there was a big world ball game on the radio,we would 21 everything and he would put the game on so we could all enjoy it.
Teens often learn things on TV or from adults about world 22 that can make them scared.Now it is terrorism(恐怖主义).Back in my teen years it was the Cold War.It worried me so much that I 23 each day would be my last.Mr.Templat knew how much it troubled his 24 .He opened the subject up to discussion.He gave us a way to express our fears and helped us understand war and politics(政治).
When I think back to those special days,I appreciate(感激)that he helped me go 25 such a difficult time in my life.
( B )16.A.happiest B.hardest
C.best D.busiest
( A )17.A.directly B.politely C.kindly D.softly
( D )18.A.played B.fought C.argued D.talked
( C )19.A.fear B.trust
C.forget D.remember
( C )20.A.progress B.results C.marks D.fever
( B )21.A.do B.drop C.learn D.repeat
( A )22.A.problems B.meetings
C.weather D.pollution
( A )23.A.thought B.decided
C.promised D.suggested
( D )24.A.relative B.family
C.teachers D.students
( D )25.A.against B.across C.over D.through
Ⅳ.阅读理解
Many people know that rubbish is a big problem on planet Earth.What many people don’t know is that junk (垃圾) has become a problem in outer space too.
According to BBC News,there are more than 22,000 pieces of space junk floating around the earth.And these are just the things that we can see from the surface of the earth by telescopes (望远镜).There are also millions of smaller pieces of junk that we can’t see.
Objects,like bits of old space rockets or satellites,move around the planet at very high speeds,so fast that even a very small piece can break important satellites or become dangerous to astronauts.If the tiniest piece of junk crashed into a spaceship,it could damage the vehicle.
To make things worse,when two objects in space crash,they break into many smaller pieces.For example,when a U.S.satellite hit an old Russian rocket in 2009,it broke into more than 2,000 pieces,increasing the amount of space junk.
To reduce additional space junk,countries have agreed that all new space tools can only stay in space for 25 years at most.Each tool must be built to fall safely into the earth’s atmosphere after that time.In the upper parts of the atmosphere,it will burn up.
Many scientists are also suggesting different ways to clean up space junk.In England,scientists are testing a metal net that can be fired into space junk.The net catches the junk and then pulls it into the earth’s atmosphere to burn up.The Germans are building robots that can collect pieces of space junk and bring them back to Earth to be safely destroyed.
“The problem is becoming more challenging because we’re sending more objects into space to help people use their mobile phones and computers,” says Marco Castronuovo,an Italian space researcher.
“The time to act is now.The longer we leave the problem,the bigger it will become,” he says.
( C )26.What does the underlined word “these” in Paragraph 2 refer to?
A.Telescopes.
B.Satellites.
C.Pieces of space junk.
D.BBC news reports.
( D )27.Why is space junk considered a problem?
A.It burns up after it re-enters the atmosphere.
B.It often stops the view of telescopes on Earth.
C.It could force new space tools to travel at slower speeds.
D.It may crash into other space tools causing damage or death.
( B )28.Countries want future space tools to be able to fall back into the earth’s atmosphere so that .
A.the tools can be reused later
B.the tools don’t become space junk
C.the earth’s atmosphere can stay clean
D.the effects of space flight can be studied
( B )29.How do the Germans plan to deal with space junk?
A.Catch it with nets.
B.Use robots to collect it.
C.Burn it in the earth’s atmosphere.
D.Send it further away from the earth.
( A )30.In which section of the newspaper would you probably read this article?
A.Environment. B.Local News.
C.Education. D.Fashion.
Ⅴ.任务型阅读(2019株洲)
阅读下面的材料,然后根据材料内容回答问题。
Sometimes we throw apple remains into forests,hoping small animals around may find them.But what if they are never noticed? People believe they would rot (腐烂)one day.So it doesn’t matter.Is that true?
Sure they will.But it won’t happen overnight.
Marjorie Woodruff,works in the Grand Canyon,set up a small experiment.She put a banana peel(皮),orange peels in a box,wide enough to allow small animals to go in and out.After six months,the orange peels had dried out,the banana had turned black.Nothing had been eaten or had rotted.
She buried the same things in sand and soil and six months later everything could still be seen.
In fact,it takes two months for apple remains to rot and an orange peel can take up to one year.
“Do we eat orange peels? We do not.So why would a squirrel (松鼠)eat?” Woodruff writes in High Country News.“The animals do just fine on nuts and berries.They do not need us.”
There’s another point to think about.
When animals start to get food from people,they may stop looking for their own food in nature.This is dangerous because it may weaken their hunting ability.Besides,they need different food.
Food waste also attracts animals to areas where there are a lot of people,says the Leave No Trace organization.This may put their life in danger as they may get used to looking for food alongside busy roads.Many of them are too small to be noticed by drivers.
When you’re throwing fruit remains,you may be fined (罚款).Fines are different.Some states might only fine people $100,but a few states fine people more than $6,000 for a first time.
31.Where does Marjorie Woodruff work?
In the Grand Canyon.
32.How long does it take for apple remains to rot?
Two months.
33.Which animal is mentioned?
A squirrel.
34.How much might you be fined at least if you throw fruit remains?
100 dollars./$100.
35.Why can’t we give food waste to animals?
Because animals need different food and food waste may put their life in danger by weakening their hunting ability and attracting them to busy roads.
2020年中考化学专题训练第三单元物质构成的奥秘（含解析）
2020年中考化学专题训练第三单元物质构成的奥秘（含解析）,物质构成的奥秘,莲山课件.
