Nuclear power’s danger to health, safety, and even life itself can be summed up in one word: radiation.

Nuclear radiation has a certain mystery about it, partly because it cannot be detected by human senses. It can’t be seen or heard, or touched or tasted, even though it may be all around us. There are other things like that. For example, radio waves are all around us but we can’t detect them or sense them without a radio receiver. Similarly, we can’t sense radioactivity without a radiation detector. But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things.

At very high levels, radiation can kill an animal or human being immediately by killing masses of cells in vital organs. But even the lowest levels can do serious damage. There is no level of radiation that is completely safe. If the radiation does not hit anything important, the damage may not be serious. This is the case when only a few cells are hit, and if they are killed immediately. Your body will replace the dead cells with healthy ones. But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble. They can grow into cancer. Sometimes this does not show up for many years.

This is another reason for some of the mystery about nuclear radiation. Serious damage can be done without the victim being aware at the time that damage has occurred. A person can be irradiated(辐射)and feel fine, then die for cancer five, ten, or twenty years later as a result. Or a child can be born weak as a result of radiation absorbed by its parents.

Radiation can hurt us. We must know the truth.

1.What is the main idea of the passage?

A. How radiation kills a man.

B. How to detect nuclear radiation.

C. The mystery about nuclear radiation.

D. Serious harm caused by nuclear radiation.

2. Which statement about nuclear radiation is true?

A. It is just like common radio waves.

B. It can be harmless if its level is low.

C. It can be detected by human senses.

D. It can cause cancer to human beings.

3. How can nuclear radiation kill an animal?

A. By damaging its heart.

B. By stopping it breathing.

C. By killing many cells in key organs.

D. By destroying its brain.

4. If a man is hit by nuclear radiation, he may _______.

A. die of cancer after many years B. die immediately

C. have a child who may be born weak D. all of the above

I have forgotten the name of the old lady, who was a customer on my newspaper route. Yet it in my memory that she taught me a lesson in that I shall never forget.

On a winter afternoon, a friend and I were stones onto the roof of the old lady's house near her garden. The was to observe how the stones changed to missiles as they to the roof’s edge and fell into the yard like comets(彗星)falling from the . I found myself a perfectly smooth rock and threw it. The stone was too , however, so it slipped from my hand as I let it go and headed straight for a small . At the sound of broken glass, we knew we were in . We ran faster than any of our stones flew off her roof.

I was too about getting caught that first night to be about the old lady with the broken window in winter. ,a few days later, when I was sure that I hadn't been discovered, I started to feel for her trouble. She still greeted me with a smile each day when I gave her the newspaper, but I was no longer able to act when seeing her.

I decided that I would save my paper delivery money, and in three weeks I had the seven dollars that I thought would the cost of her window and sent it to her in an envelope.

The next day, I the old lady her paper. She thanked me for the paper and gave me a bag of biscuits she had made herself. I thanked her and ate the biscuits I continued my route.

After several cookies, I felt an envelope and pulled it out of the . When I opened the envelope, I was . Inside were the seven dollars and a short note that ,“I'm proud of you.”

1.A. fails B. fades C. impresses D. remains

2.A. forgiveness B. value C. honesty D. gratefulness

3.A. collecting B. putting C. throwing D. placing

4.A. subject B. theme C. topic D. object

5.A. shot B. rolled C. got D. dropped

6.A. earth B. ocean C. sky D. universe

7.A. smooth B. square C. heavy D. beautiful

8.A. ceiling B. door C. chimney D. window

9.A. danger B. trouble C. surprise D. comfort

10.A. scared B. excited C. disappointed D. confused

11.A. frightened B. depressed C. puzzled D. concerned

12.A. However B. Therefore C. Besides D. Furthermore

13.A. honored B. guilty C. pleased D. pressed

14.A. proud B. active C. comfortable D. energetic

15.A. include B. increase C. cover D. mend

16.A. handed B. turned C. passed D. sent

17.A. because B. where C. since D. as

18.A. paper B. pocket C. bag D. wallet

19.A. annoyed B. surprised C. amused D. delighted

20.A. attached B. said C. told D. wrote

“Wanted: Violin

Can’t pay much

Call … ”

Why did I notice that? I wondered, since I rarely looked at the classified ads. I laid the paper on my lap and closed my eyes, remembering what had during the Great Depression, when my family to make a living on our farm. I, too, had wanted a violin, but we didn‘t have the .

When my older twin sisters began showing an interest in music, Harriet Anne learned to play Grandma‘s upright piano, Suzanne turned to Daddy‘s violin, simple tunes soon became 24 melodies as the twins played more and more. in the rhythm of the music, my baby brother danced around while Daddy hummed(哼唱)and Mother whistled. I just .

When my arms grew enough, I tried to play Suzanne‘s violin, I loved the beautiful sound drawn across the strings. Oh, how I wanted one! But I knew it was the question.

One evening as the twins played in the school orchestra, I closed my eyes tight to capture the picture firmly in my . “Someday, I‘ll sit up there.” I vowed(发誓) .

Unfortunately, it was not a year. At harvest the crops did not bring as much as we had hoped. I, however, couldn‘t any longer to ask, “Daddy, may I have a violin of my own?”

“Can‘t you use Suzanne‘s?”

“I‘d like to be in the orchestra, too, and we can‘t use the same violin at the same time.”

Daddy‘s face looked . That night, and many following nights, I heard him God in our family devotions: “… and Lord, Mary Lou wants her violin.”

One evening we all sat around the table. The twins and I studied. Mother sewed and Daddy wrote a letter to his friend, George Finkle, in Columbus. Mr.Finkle, Daddy said, was a fine violinist.

As he wrote, Daddy read of his letter out loud to Mother. Weeks later I he‘d written one line he didn‘t read aloud: “Would you watch for a for my third daughter? I can‘t 40 much, but she enjoys music. And we‘d like her to have her own instrument.”

1.A. managed B. promised C. struggled D. forced

2.A. luck B. money C. choice D. hope

3.A. while B. since C. after D. before

4.A. soft B. fluent C. gentle D. lovely

5.A. Picked out B. Caught up C. Taken on D. Called for

6.A. shouted B. laughed C. listened D. cried

7.A. long B. tough C. old D. slim

8.A. far from B. next to C. out of D. along with

9.A. dream B. hand C. life D. mind

10.A. faithfully B. silently C. frequently D. patiently

11.A. hopeless B. stable C. good D. difficult

12.A. stand B. help C. wait D. risk

13.A. both B. ever C. either D. still

14.A. angry B. sad C. pale D. weak

15.A. demand B. inform C. commit D. remind

16.A. favourite B. private C. own D. individual

17.A. parts B. lines C. contents D. purposes

18.A. heard B. conveyed C. discovered D. observed

19.A. musician B. favor C. gift D. violin

20.A. owe B. order C. charge D. pay

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网