If you can find a tree which has been cut down，you will see many rings，or circles，on the base of the trunk.By learning to read these rings，you can find out about the tree's life.
The number of rings tells you how old the tree is.Each year，new wood is formed on the outside of the tree.This new wood is light in color when the tree is growing in spring and summer，and dark in winter when the tree is not growing much.So，if you count the rings of dark?or?light colored wood，you can often find out how old the tree is.
You can also tell which years have been good years and which years have been bad years.When the light?colored rings are very wide，it means that the tree has been growing quickly that year.If the rings are narrow，it has been growing slowly.If the rings on a tree trunk were greatly magnified，you would be able to see why the rings are light?colored when the tree is growing quickly and dark?colored when the tree is growing slowly.The tree trunk is made up of microscopic tubes，like some pipes，carrying water from the soil，through the trunk，and up to the leaves.They are wide and thin?walled when the tree is growing quickly and they are carrying a lot of water.They are narrow and stuck together when the tree is not growing so quickly.
When a tree is old，the tubes in the centre of the tree don't carry water.The walls of the tubes have become thick with materials which have stuck along them over the years，forming a kind of wood called“heartwood”．This kind of wood is darker in color than the young，growing wood on the outside of the tree.
You don't very often see whole tree trunks which have been cut across.But once you learn to read a cross section of the wood，you can see much more in wood which has been used to make boxes，houses and other things.
In most wood，instead of seeing the trunk cut across，you are seeing it cut along its length.Because you don't see the whole tree，you can't tell how old it is.
Title：1.of a Tree
General information | Old trees | ||
Items | Facts | Items | Facts |
Where can rings be seen | On the 2.of a trunk | The tubes in the centre of the tree | Don't carry water |
The3.of rings | Helps us know about its age | The walls of the tubes | Become 4.； Form 5. |
6.light?colored rings | Show the tree grows quickly | ||
Narrow7. rings | Mean the tree grows slowly | ||
Microscopic tubes | Function | Carry8. | |
Features | Wide and 9.when growing quickly | ||
Narrow and stuck together when growing 10. | |||
举一反三单元同步过关卷系列答案科目：高中英语 来源：山西省校2016-2017学年高二6月月考（月考八）英语试卷 题型：阅读理解
The teachers are preparing their classrooms for the start of classes. As their principal, I was energized by their enthusiasm. Everywhere I went, I asked the same question, “How are you doing?” And everywhere I went, I received the same answer, “just fine.”
There was only one person whom I didn’t quite believe. It was her first year of teaching. Her classroom was inviting. She seemed well-prepared. On the outside everything seemed just fine, but there was something in her eyes that mad me ask that question again and again.
Then came Wednesday. “How are you doing?” I asked. “Mr. Boyce, I think I’m going to make it,” she said. The office was full of teachers and noise, but the voices became quiet as the young teacher continued.
“Monday night, after our open house (开放参观日)，I just didn’t think I could do it. There were so many parents and children, and I felt under great pressure. When I told my family I didn’t think I could do it , they said I had to try.
“The next morning school started. I thought I was ready, but there were so many of them and their needs were so different. I just didn’t know how I could manage.
“I said to my parents if I had fewer kids I could handle it. So they asked me which children I would get rid of. But I couldn’t decide. I’d only had them for one day, but I couldn’t think of a single child I could do without. They’re mine. I can’t do without any of them. I don’t know how, but I’m just going to do the best I can and I really think I’m going to make it. “
There wasn’t a dry eye in the office when I replied, “I think you are, too.”
1.Why did the principal ask the new teacher the same question repeatedly?
A. She used to lie to others.
B. He just wanted to show his authority.
C. she was not as enthusiastic as other teachers.
D. He could tell from her eyes that she wasn’t well-prepared.
2.What was her family’s advice for the new teacher?
A. To give up B. To have her own kids.
C. To make an attempt D. To kick out the naughty kids.
3.It can be inferred that the new teacher____.
A. was not good at teaching.
B. liked her job to be a challenge
C. loved each of her students
D. didn’t have much confidence in herself.
4.What was other teachers’ response to the new teacher’s words?
A. Doubtful B. Absent-minded.
C. Tired and sleepy D. Deeply affected.
查看答案和解析>>
科目：高中英语 来源：广东省广州市三校2016-2017学年高一下学期期中联考英语试卷 题型：单项填空
A computer ____________ think for itself; it must be told what to do.
A. can’t B. couldn’t
C. may not D. might not
查看答案和解析>>
科目：高中英语 来源：浙江省金华市2016-2017学年高二6月月考英语试卷 题型：完形填空
As the saying goes, roses given, fragrance in hand. I am always in the _______of giving money to every beggar or homeless person I pass by. My friends say it is not good to _______. We may come across beggars or homeless people begging every day and all beggars have their ability to survive. It _______ them that I never listen.
On a _________day, my friend and I were walking to the _______ when I passed a beggar lady. I had seen her several times before and had always given her a few _______. That day, I gave her 2 Euros. I was waiting for the bus and reading a book when I _______ to see that lady standing in front of me. She _______ me a piece of paper covered in a plastic bag to prevent it from getting _______. She stood there, looking at me ________. Putting away my book, I took the paper, which ________ she and her family had to ________ their country because of floods, and she was ________ to support them. She had got a bit of money, but she needed five ________ Euros to get home. I ________ in my pockets and found 20 cents. My friend ________a 5 Euro note. I asked her to give it to the lady, and said that I would ________ the next day. When she got the money, the lady hugged us and said thanks again and again, and went on her way. Later on the bus, I wondered where her home was and ________she had gotten to this country. In her story, I felt that my friend and I would always remain part of it as the ________, who helped her get home on a rainy day. But for me, helping a stranger did bring me happiness, giving me a pleasant ________.
1.A. time B. habit C. trend D. way
2.A. evaluate B. expose C. encourage D. envy
3.A. delights B. attracts C. interests D. annoys
4.A. rainy B. dry C. sunny D. cloudy
5.A. airport B. downtown C. railway station D. bus stop
6.A. cents B. suggestions C. books D. roses
7.A. turned around B. looked down C. looked up D. stood up
8.A. asked B. handed C. bargained D. begged
9.A. lost B. burnt C. wet D. dirty
10.A. eagerly B. clumsily C. cheerfully D. silly
11.A. said B. spoke C. wrote D. told
12.A. miss B. blame C. support D. leave
13.A. hesitating B. exploring C. struggling D. searching
14.A. many B. much C. another D. more
15.A. touched B. fished C. watched D. looked
16.A. took out B. gave out C. handed in D. made out
17.A. take back B. pay back C. come back D. get back
18.A. why B. how C. where D. whether
19.A. lookers-on B. passers-by C. foreigners D. strangers
20.A. situation B. spirit C. mood D. position
查看答案和解析>>
科目：高中英语 来源：福建省莆田市2016-2017学年高二下学期第二次月考英语试卷 题型：阅读理解
Everyone needs friends. We all like to feel close to someone. It is nice to have a friend to talk, laugh and do things with. Surely, there are times when we need to be alone. We don't always want people around. But we would feel lonely if we never had a friend.
No two people are the same. Sometimes friends don't get along well, which doesn't mean that they no longer like each other. Most of the time they will go on being friends. Sometimes friends move away, then we feel very sad. We miss them much, but we can call them and write to them. Maybe we would never see them again, and we can make new friends. It is surprising to find out how much we like new people when we get to know them. Families sometimes name their children after a close friend. Many places are named after men and women, if they are friendly to people in a town. Some libraries are named this way. So are some schools. We think of these people when we go to these places.
There's more good news for people, if they have friends. These people live longer than those people if those don't have friends. Why? It could be that they are happier. Being happy helps you stay well. Or it could be just knowing that someone cares, if someone cares about you, you take better care of yourself.
1.The first paragraph tells us __________.
A. none needs friends
B. we always need friends around us
C. making friends is the need in people's life
D. we need to be alone
2.Which of the following is what the writer doesn't say in the passage?
A. People are happy when their friends leav
e them.
B. People may never see their friends after their friends move away.
C. People can know their friends in different ways.
D. People like their friends very much if they get to know them.
3.Which of the following is the most probable place people name after friendly people?
A. A house. B. A room.
C. A library. D. A village.
4.If people have friends, they would live longer, because __________.
A. they feel happier and healthier B. they get a lot of help from their friends
C. they take better care of themselves D. both A and C
查看答案和解析>>
科目：高中英语 来源：江苏省高中英语必修五牛津译林版练习题：Unit 2 The environment 题型：单项填空
In those days, our _________ concern was to provide people who were stopped by the snow storm with food and health care.
A. normal B. constant
C. permanent D. primary
查看答案和解析>>
科目：高中英语 来源：江苏省高中英语必修五牛津译林版练习题：Unit 2 The environment 题型：单项填空
Tom felt that he himself，rather than the girls，________for the failure of the football match.
A. were to blame B. was to blame
C. were to blamed D. was to be blamed
查看答案和解析>>
科目：高中英语 来源：江苏省高中英语选修六牛津译林版练习题：Unit 2 What is happiness to you？ 题型：单项填空
—Another beer，OK?
—________The same again，please.
A. Not really. B. Not likely.
C. Why not? D. Don’t bother.
查看答案和解析>>
科目：高中英语 来源：河南省郑州市2016-2017学年高二下学期入学测试英语试卷 题型：阅读理解
The Internet can be a great way to connect with people.The latest web craze is social networking on websites such as MySpace.More than 65 million young people use online social networking sites.
That cyberspace（网络空间）trend is causing problems in school,however.In a recent survey,nearly 36 percent of school administrators said that social networking sites troubled learning in their districts.Should school districts ban sites like MySpace?
Teachers are worried that some students use social networking to post personal information and to cyber bully（恐吓）other students.One of the biggest dangers comes from people who find out kid’s personal information.
Many districts have blocked students from accessing or using social networking sites from school computers,and some have suspended（暂缓）students for posting harmful material on those sites from their home computers.Nearly two-thirds of US kids have computers in their homes,according to the US Census Bureau.
It is important to keep in mind that just blocking access to social web sites at school is not the end of the story,” warns NSBA executive director Anne Bryant,“Most of the misuse of these sites takes place at home but still affects the classroom.”
Some educators aren’t as quick to pull the plug on social networking.They say the main problem with sites like MySpace is that students don’t understand the dangers involved in using them.“Many students are posting personal information about themselves without regard to who has access to that information,”Jim Hirsch said,“Schools should focus on educating their students and their parents on how to be safe online.”
Experts argue that too many schools are forbidding students to use social networking web sites without thinking about their educational benefits.“Social networking web sites can help connect students in the United States to their peers in other countries, providing invaluable lessons in foreign cultures,”explains Hirsch.
1.Where do students usually misuse social networking sites?
A. At the teacher’s office. B. At the net bar.
C. At the classroom. D. At home.
2.The underlined sentence in Paragraph 6 may mean .
A. some educators are in favor of students’ using social networking sites
B. some educators can’t block students from accessing social networking sites
C. some educators can’t connect social networking sites easily
D. some educators find it difficult to close social networking sites
3.Which of the following is true according to the passage?
A. The Internet can’t be a good bridge to get along well with students.
B. There are some students threatening other students by using social networking.
C. Most of the misuse of these social web sites takes place at school and affects the home.
D. Too many schools allow students to use social networking sites without Question.
4.What might be the most suitable title for the passage?
A. Lessons Online? B. Friendship Online?
C. Dangers Online? D. Information Online?
查看答案和解析>>
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com
