Have you ever heard a news reporter talk about DNA? Reporters talk about DNA found at the scene of a crime. They talk about police finding DNA “fingerprints.” Police sometimes use DNA as a clue to find out who committed the crime.
DNA is a substance（物质） that makes up genes. Everything alive has genes. Plans have genes. Animals have genes. Yo
u have genes.
Genes are the basic units of heredity（遗传）. Heredity means all the characteristics you inherit from your parents. You get your genes from your parents. You inherit half of your genes from your mother. You inherit half of your genes from your father.
Genes are a kind of code. A tree’s genes tell w
hat shape its leaves will be. A cat’s genes tell what color its fur will be. Your genes tell what color your eyes will be. Your genes tell what color your hair will be. Everything about you co
mes from the code in your genes.
Genes line up on strands（链） called chromosomes（染色体） in cells. Everything alive is made up of cells. Chromosomes are in the center, or nucleus, of cells.
Different parts of you are made of different kinds of cells. Your muscles are made of muscle celIs. Your skin is made of skin cells. The code in your genes tells your body to make different kinds of cells. The genes in each cell tell the cell how to work. They tell the cell when to make new copies of itself.
An Austrian monk named Gregor Mendel first saw inherited patterns in pea plants. He experimented with pea plants in the 1860s. One of the things, or traits（特质）， Mendel studied was what makes some pea plants tall and some short. He said that the traits must come from units of heredity passed from the parent plants. These units were later called genes.
In the mid-1900s, scientists discovered that genes are made of DNA. In the 1970s, scientists learned how to change DNA with genetic engineering. Scientists also learned that problems with certain genes cause diseases. Muscular dystrophy, cystic fibrosis, and hemophilia are some genetic diseases-diseases caused by problems in genes. Today, scientists are looking for ways to cure genetic diseases by changing genes through a process called gene therapy.
【小题1】 What is DNA?
| A．DNA is a kind of gene. |
| B．DNA is a substance that makes up genes. |
| C．DNA is the basic unit of heredity. |
| D．DNA is a measure to protect crime. |
| A．Plants, animals and human beings have the same genes. |
| B．Half people inherit all genes from their mother, others from their father. |
| C．Genes decide the trees shapes, the cats’ fur color and our eyes’ color as well. |
| D．Genes will give you a code when you need them. |
| A．Genes lining up on strands called chromosomes are in the center of cells. |
| B．Genes hide in everything alive in your body. |
| C．Genes can be nowhere but in your mind, controlling all your actions. |
| D．Genes travel in your body and help cope skin, muscle, and eyes. |
| A．first saw inherited patterns in people |
| B．was interested in why plants were different |
| C．first called the units of heredity from parents genes |
| D．was the first who discovered genes |
| A．scientists were less intelligent than monks in 1900s |
| B．some genes are bad and can cause diseases |
| C．we don’t need to worry about genetic diseases any longer |
| D．the discovery of genes may be of great help in our daily life |
优生乐园系列答案
新编小学单元自测题系列答案科目：高中英语 来源：2014届湖北武汉部分重点（四校）高一上学期期中英语试卷（解析版） 题型：阅读理解
I have been using the Internet since I was five years old, when my dad first sat me down in front of a computer and connected me the World Wide Web.
I’ve always felt like a master of the Internet world. AOL Instant Messaging, MSN, Gmail, Facebook, Myspace -- I’ve got it all under control. I thought there was nothing more to it besides checking my e-mail and wasting my time, until I was introduced to electronic commerce(e-commerce): business on the Internet.
Some online businesses are run from one-room home offices. Others have hundreds of employees (雇员) across the world. Have you ever heard of Amazon.com, Yahoo.com?
My friends often said they got cheap textbooks off Amazon.com, or had a good deal (交易) on Steve Madden shoes that were on sale at SteveMaden.com. Unfortunately for me, I continued my “e-commerceless” Web-surfing, not knowing about all the deals I was missing out on.
That is, of course, until my sister finally sold the idea to me.
“Why are all these packages arriving in the mail for you, Katy?” I asked her one day. Strange envelopes (信封) had been put on our doorstep for weeks now, each one always addressed to my sister; and we all know little sisters should never be getting more mail than their elders!
“Oh, it’s the things I ordered online!” she answered. I watched speechlessly as she opened them. There was no way our parents were letting her spend that much money- online or off!
“How much did all of this coat?”
“Oh, only about $15 in all!” She said excitedly. “Everything on eBay is on sale! It’s a way better than going to the mall.”
I felt as if there had been a store right in my backyard that I had never walked into! That week, I ordered a used Spanish textbook for my summer course online for 10 percent of the publishing price. A few days later, I bought an iPod protector and a book or two via the wonderful eBay.com.
1.From the first two paragraph we can conclude that the author
|
A．had no experience using computers |
|
B．had no idea of what e-commerce is |
|
C．only used the Internet to check e-mail |
|
D．thought surfing the Internet was a waste of time |
2.The writer didn’t find out about e-commerce until
|
A．he stopped web-surfing |
|
B．he visited a store in his backyard |
|
C．his sister explained the packages she got by mail |
|
D．his friends told him about the online deals they made |
3.We can infer from the last paragraph that the author .
|
A．never enjoyed shopping that much |
|
B．loves the big store in her backyard |
|
C．feels she is a true master of the Internet |
|
D．has begun to enjoy online shopping |
4.What’s the purpose of the article?
|
A．To tell the readers how he begins online shopping. |
|
B．To do business on the Internet. |
|
C．To make an online shopping ad. |
|
D．To advise people not to do online shopping |
查看答案和解析>>
科目：高中英语 来源：甘肃省天水市2009--2010学年度高二下学期第一次月考 题型：其他题
五：补全对话（共5小题，每题1分，共5分）。
根据对话内容，从对话后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
A: Good morning. Marketing Department.
B: Well, I’m phoning about a job you advertised in the local newspaper.
A: I’m the marketing manager. 61
B: Yes, it’s Johnson.
A: Good. 62 And you are still in college?
B: Twenty-four years old. 63
A: And what’s your major at college?
B: 64 Besides, I studied English, law, accounting, computer and ten more courses.
A: 65
B: Yes, I worked in the marketing department during the summer holidays.
A: Um, I see. Could you come for an interview at 2: 15 p.m. on Wednesday, young man?
B: Yes, madam.
A: Good. See you then.
|
A．I graduated one year ago. |
|
B．Could I have your name, please? |
|
C．How old are you? |
|
D．Who is it speaking? |
E.Are you good at English?
F.Have you any experience as salesman?
G.Business administration(管理).
查看答案和解析>>
科目：高中英语 来源：江苏省淮安市2010届高三下学期5月调研测试英语试卷 题型：阅读理解
第三部分：阅读理解供15小题：每小题2分，满分30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。
I was sure that I was to be killed. I became terribly nervous. I searched in my pockets to see if there were any cigarettes, which had escaped their search. I found one and because of my shaking hands, I could barely get it to my lips. But I had no matches, they had taken those. I looked through the bars at my jailer. He did not make eye contact with me. I called out to him, “Have you got a light?” He looked at me, shrugged and came over to light my cigarette. As he came close and lit the match, his eyes inadvertently(不经意地) locked with mine. At that moment, I smiled. I don’t know why I did that. Perhaps it was nervousness, perhaps it was because, when you get very close, one to another, it is very hard not to smile. In any case, I smiled. In that instant, it was as though a spark jumped across the gap between our two hearts, our two human souls. I know he didn’t want to, but my smile leaped through the bars and generated a smile on his lips, too. He lit my cigarette but stayed near, looking at me directly in the eyes and continuing to smile.
I kept smiling at him, now aware of him as a person and not just a jailer. And his looking at me seemed to have a new dimension too. “Do you have kids?” he asked. “Yes, here, here.” I took out my wallet and nervously fumbled for the pictures of my family. He, too, took out the pictures of his family and began to talk about his plans and hopes for them. My eyes filled with tears. I said that I feared that I’d never see my family again, never have the chance to see them grow up. Tears came to his eyes, too. Suddenly, without another word, he unlocked my cell and silently led me out. Out of the jail, quietly and by back routes, out of the toxin. There, at the edge of town, he released me. And without another word, he turned back toward the town.
“My life was saved by a smile.” Yes, the smile -- the unaffected, unplanned, natural connection between people. I really believe that if that part of you and that part of me could recognize each other, we wouldn’t be enemies. We couldn’t have hate or envy or fear!
1. Why did the author smiled to the jailer first?
A. Because he wanted to make friends with the jailer.
B. Because he wanted to give a good impression on the jailer.
C. Because he wanted to share the cigarette with the jailer.
D. The reason was unknown to him and us.
2. Which of the following is the fight order according to the story?
a. I was set free at the edge of town.
b. I wanted to borrow a light from the jailer.
c. I was arrested and quite frightened.
d. I took out the pictures of my family.
e. The jailer took out the pictures of his family.
A. c, b, e, d, a B. b, c, d, a, e C. c, b, d, e, a D. c, d, e, b, a
3. It can be inferred from the passage that ____________.
A. Before the author was released, he had stayed there for a long time.
B. Both of the author and the jailer loved their families very much.
C. The author had no chance to see his family again.
D. The jailer was punished by his leader at last.
4. What is the best title of the passage?
A. The use of smile B. Life in the jail.
C. The smile D. Love is everywhere.
查看答案和解析>>
科目：高中英语 来源：2010-2011学年广东高州长坡中学高三第6周抽考英语卷 题型：其他题
根据对话内容，从对话后的选项中选出能填入空白处的最佳选项。选项中有两项为
多余选项。
A: Some of our classmates are going to Japan for the summer vacation． Will you join them?
B : 1. But I have to go back home to stay with my mother because she is badly ill in bed．
A : Oh, that’s too bad!
B : 2.
A : Yes, my aunt in Hawaii has invited me to spend my vacation with her．
B : Great ! Hawaii is a wonderful place, isn’t it?
A : Certainly, I suppose she’ll show me around some interesting places there． 3.
B : As I know． Hawaii was discovered by Captain Cook in the 1770s and he got killed there the next year he discovered it．
A : That’s right． 4.
B : Sure, you’ll certainly enjoy yourself． But don’t forget to write to me, will you?
A : 5.
A : Of course, I will．
B : But now it’s become a world – famous scenic spot．
C : I would go to, should I have the chance．
D : Have you got a way to spend yours?
E : No, never．
F : And I’m going to read some books about its history as well．
G : And I’ll go there as soon as the vacation starts．
查看答案和解析>>
科目：高中英语 来源：2009-2010学年河南省高二下学期第一次调考（英语） 题型：其他题
任务型阅读（从六个待选项中为每短话选择一个合适的标题，不必全部使用。）
Hollywood movies are regularly filled with sex and violence. They can be exciting films but sometimes all you want is a little light-hearted entertainment.
51.________ Have you heard of Bollywood? All singing, all dancing and unrealistic, it is the perfect alternative to normal Hollywood movies. Bollywood is the Indian film industry, based in Mumbai, formerly known as Bombay. Most Chinese school kids have probably never seen an Indian film. Yet Bollywood is the largest producer of films in the world. This year the Indian Filmgare Awards, Bollywood's Oscars, turn 50 years old.
52._________ The typical Bollywood movie usually has the following ingredients: a cup of romance, a tea-spoon of comedy, a dash of international sight-seeing, served with a huge slice of singing and dancing. There will also be one brave hero, one beautiful heroine and one baddie. The result is a fun-filled musical.
53._________ There is never any mention of politics, poverty or war. The actors change clothes and locations within a single song. But the audiences don’t mind. To Indian movie lovers, especially the poor, such films are a gateway to heaven and the stars are their gods. The films take them to a magical world away from their everyday troubles. The films tell them the impossible is possible and that true love conquers all.
54.__________ But, behind the beautiful scenes, Bollywood still emphasizes traditional family values. In most films, if two lovers want to break an arranged marriage, they can't just run away. They must win over their parents.
55.___________ So if you're tired of all that Hollywood actions, check out the following Bollywood films. They will take you to a brighter, cheerier and more colourful world, where it's still cool to dance around a tree and sing a love song.
|
A．Bollywood pays great attention to traditional values. |
|
B．Bollywood is lees famous than Hollywood, and yet it produce the most films in the world. |
|
C．Bollywood films are full of ideal things and free of daily worries. |
|
D．Bollywood is a decent refreshing replacement for those over-stimulating Hollywood films. |
E. Bollywood has gradually won its reputation on the world stage.
F. Bollywood films are mostly comic romances with light-hearted incidental music.
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
