In the future，we may not need to rely on huma...

In the future，we may not need to rely on human donations for life-saving skin grafts(移植）.

That’s the goal of Xeno Therapeutics, a biotech non-profit organization. The US Food and Drug Administration approved the group’s initial application for temporary skin grafts removed from genetically modified(基因改良）pigs. This means that they can start testing pig skin grafts on people who have experienced severe burns.

Skin，the body’s largest organ，plays an important role in blocking pathogens(病原体） from reaching our organs inside. It also helps the body keep a constant temperature. People with severe skin damage are at a high risk of developing deadly infections as a result of changes in temperature.

At the moment, the only skin grafts available in the US come from the dead people who have agreed to be organ donors, or patients who have gone through surgery to remove skin after large weight loss. These human skins used for grafts are not easy to find.

Xeno Therapeutics, which gets its name from animal-to-human transplants, has raised pigs that have skin remarkably similar to our own. Grafts from these pigs are therefore more likely to hide without being detected by the host's immune system—at least temporarily. The idea is that they could be used for immediate burn treatment, followed human skin graft treatment later.

“I’d say that just like comparing a Coke with Pepsi，it would be hard to tell which was the human skin and which was the pig graft，” said Xeno Therapeutics CEO Paul Holzer.

The non-profit organization has been working to conduct the clinical trials, which will only be testing the grafts’ safety and tolerability in six patients with severe burns. Assuming the results are positive after a month, the grafts will need to pass through two more stages of testing before they can be approved for widespread clinical use.

Several other groups around the world are working to make animal organs suitable for clinical medicine. In Brazil, researchers are exploring using tilapia skin as temporary bandages for burn victims whose skin is regrowing.

1.What’s the aim of Xeno Therapeutics?

A.To make profit from the grafts. B.To apply pig skin on human patients.

C.To modify pigs genetically. D.To test people with severe burns.

2.Why is skin important to human body?

A.It acts as a protective layer for our body. B.It helps us recover from deadly diseases.

C.It prevents itself from being damaged. D.It keeps one’s temperature changing.

3.What is Paul Holzer’s attitudes towards the pig skin grafts?

A.Doubtful. B.Worried.

C.Confident. D.Flexible.

4.What can we know about the grafts?

A.Only skin removed from pigs can be used for grafts.

B.Brazilian doctors have also applied pig skin for grafts.

C.Animal skin has been used on six patients safely.

D.They won't be put to use until they pass test

英语阅读理解中等难度题查看答案及解析

阅读理解。

Someday in the future we may not need to have money in our pockets. Is life easier when people don’t need to carry any money at all? Is money heavy to carry? Is it safe to carry money? Maybe in the future each of us will have only one small credit card(信用卡). We will use it instead of money to buy all the things.

Of course we may still have some of the same problems with cards we now have with money. For example, we lose money from time to time. Maybe we will lose the cards. Maybe someone will take the cards. Someone may even make a card that looks like our cards. Since we can’t buy anything without our cards, the credit cards may be no better than money.

Is there something easier to use than credit cards? Each of us has a thumbprint(拇指指纹). No two thumbprints are the same. Maybe someday the government will keep people’s thumbprints with a number. When you want to buy something, you will put your thumb on a machine or a computer. Each store or business will posses one. Everyone’s thumbprints will be in the computer. It will be difficult to lose our thumbprints! It will be difficult for someone to steal it or to make one like it.

1.The writer probably agrees that credit cards are ________ to carry than money.

A.heavier 　　　　　　 　　 B. easier 　　　　　　 C. more difficult

2.What may be a problem with credit cards in the future?

A. We may lose the cards from time to time.

B.We won’t be able to make enough cards.

C.We may not know how to use the cards.

3.Someday the government may keep people’s thumbprints with a ________.

A.sign 　　　　　　 　 　　 B. note 　　　　　　　　 　 C. number

4.The underlined word “posses” probably means “________” in English.

A.lend　　　　　　　　 　 B. have 　　　　　　　　 C. sell

5.In the writer’s opinion, it’ll be the best way to buy things with ________ in the future.

A.money 　　　　　　　　 　 B. credit cards 　　　 C. thumbprints

九年级英语阅读理解中等难度题查看答案及解析

阅读理解。

Someday in the future we may not need to have money in our pockets. Is life easier when people don’t need to carry any money at all? Is money heavy to carry? Is it safe to carry money? Maybe in the future each of us will have only one small credit card(信用卡). We will use it instead of money to buy all the things.

Of course we may still have some of the same problems with cards we now have with money. For example, we lose money from time to time. Maybe we will lose the cards. Maybe someone will take the cards. Someone may even make a card that looks like our cards. Since we can’t buy anything without our cards, the credit cards may be no better than money.

Is there something easier to use than credit cards? Each of us has a thumbprint(拇指指纹). No two thumbprints are the same. Maybe someday the government will keep people’s thumbprints with a number. When you want to buy something, you will put your thumb on a machine or a computer. Each store or business willpossesone. Everyone’s thumbprints will be in the computer. It will be difficult to lose our thumbprints! It will be difficult for someone to steal it or to make one like it.

1.The writer probably agrees that credit cards are ________ to carry than money.

A. heavier B. easier C. more difficult

2.What may be a problem with credit cards in the future?

A. We may lose the cards from time to time.

B. We won’t be able to make enough cards.

C. We may not know how to use the cards.

3.Someday the government may keep people’s thumbprints with a ________.

A. sign B. note C. number

4.The underlined word “posses” probably means “________” in English.

A. lend B. have C. sell

5.In the writer’s opinion, it’ll be the best way to buy things with ________ in the future.

A. money B. credit cards C. thumbprints

八年级英语阅读单选中等难度题查看答案及解析

Someday in the future we may not need to have money in our pockets. Is life easier when people don’t need to carry any money at all? Is money heavy to carry? Is it safe to carry money? Maybe in the future each of us will have only one small credit card(信用卡). We will use it instead of money to buy all the things.

Of course we may still have some of the same problems with cards we now have with money. For example, we lose money from time to time. Maybe we will lose the cards. Maybe someone will take the cards. Someone may even make a card that looks like our cards. Since we can’t buy anything without our cards, the credit cards may be no better than money.

Is there something easier to use than credit cards? Each of us has a thumbprint(拇指指纹). No two thumbprints are the same. Maybe someday the government will keep people’s thumbprints with a number. When you want to buy something, you will put your thumb on a machine or a computer. Each store or business will posses one. Everyone’s thumbprints will be in the computer. It will be difficult to lose our thumbprints! It will be difficult for someone to steal it or to make one like it.

1.The writer probably agrees that credit cards are ________ to carry than money.

A. heavier B. easier C. more difficult D. more expensive

2.What may be a problem with credit cards in the future?

A. We may lose the cards from time to time.

B. We won’t be able to make enough cards.

C. We may not know how to use the cards.

D. We may make cards like others.

3.Someday the government may keep people’s thumbprints with a ________.

A. sign B. note C. number D. symbol

4.The underlined word “posses” probably means “________” in English.

A. lend B. have C. sell D. make

八年级英语阅读单选中等难度题查看答案及解析

Someday in the future we may not need to have money in our pockets. Is life easier when people don’t need to carry any currency at all? Is money heavy to carry? Is it safe to carry money? Maybe in the future each of us will have only one small plastic credit card. We will use it to buy all the things we now buy with money. We will not need money to pay for things.

Of course we may still have some of the same problems with cards we now have with money. Sometimes we lose money. Maybe we will lose the cards. Maybe someone will take the card. Someone may even make a card that looks like our card. Since we can’t buy anything without our cards, the credit card may be no better than currency.

Is there something easier to use than credit card? Each of us has a thumbprint(拇指纹). No two thumbprints are the same. Maybe someday the government will keep people’s thumbprints with a number. When you want to buy something you will put your thumb on a machine or a computer. Each store or business will have one. Everyone’s thumbprint will be in the computers. It will be very difficult to lose our thumbprints! It will be difficult for someone to steal it or to make one like it.

根据材料内容选择最佳答案，将其标号填入题前括号内。

1.The underlined word “currency” probably means __________here.

A. thumbs　　　　　　 B. coins

C. plastic card　 D. paper money

2.Our thumbprints may be used in the future because ____________.

A. each store will have a computer

B. each person’s thumbprint is different

C. they will help each store

D. computers need them

3. Which of the following is NOT TRUE?

A. Each person has a different thumbprint

B. There are some problems with the use of credit cards.

C. There are no currency problems.

D. There are easier things to use than credit cards.

4.Which of the following gives the main idea of the second paragraph?

A. Credit cards may be no better than currency.

B. We use credit cards because money may be stolen.

C. We have many problems with money.

D. Credit cards are worse than currency.

5.The writer wants to tell us___________.

A. we will use credit cards in the future

B. we may use our thumbprints to buy something.

C. it will be safer to carry money when shopping

D. everyone will make lots of money

九年级英语阅读理解中等难度题查看答案及解析

Scientists believe that in the future there ______ a planet for humans to live on.

A. is　　 B. will be　　 C. is going to have　　 D. won’t have

八年级英语单选题中等难度题查看答案及解析

The kids may not go to school in the future.They____at home on computers.

A.have studied　　　 B.will study　　　　　 C.studied

九年级英语单项填空中等难度题查看答案及解析

You ______ have been out last night, for all the lights in your room were not on.

A.need B.must C.may D.should

高一英语单项填空中等难度题查看答案及解析

---Fish need water to survive; _____ , we human beings rely on air to live.

高三英语单项填空中等难度题查看答案及解析

Sleep is a basic human need, as basic as the need for oxygen. Getting a good night’s sleep is not only directly related to how we feel the next day, but to our long-term health as well. However, many of us suffer from insomnia (失眠). Even more of us report at least one night of restless sleep per week. This is a serious problem.

Well, how can we make sure that we rest well and stay healthy? Here are some suggestions.

If you can’t sleep in the middle of the night, don’t get up. The bright light will affect your body clock and worsen your insomnia. Stay in bed!

Avoid short sleep during the day, except for a brief ten to fifteen-minute sleep between 2:00 and 4:00 P.M.

Limit your time in bed to the average number of hours you’ve actually slept per night last week. Don’t try to make up for lost sleep. It can’t be done.

Get regular exercise each day, but finish at least six hours before bedtime. Exercising in the evening can help keep you awake.

Take a hot bath for thirty minutes within two hours of bedtime. The bath will warm you, relax you, and make you feel sleepy.

Keep our bedroom dark, quiet, and well ventilated (通风).

Keep a regular schedule seven days a week. Avoid sleeping late on weekends. Although it may feel good while you’re doing it, sleeping late on weekend can lead to insomnia during the week.

Don’t drink alcohol (酒精). Although, having a drink before bed makes you sleep, alcohol loses its effects after a while. The secondary effects of alcohol can wake you up during the second half of your night’s sleep.

Keep the face of the clock in your bedroom turned away, and don’t find out what time it is when you awaken in the night.

1.The first paragraph serves as a(n) __________.

A. argument　　　　 B. introduction

C.　 comment　　　　 D. explanation

2. Which of the following is NOT advised for a good night’s sleep?

A. Staying in bed after failing to sleep.

B. Don’t exercise six hours before sleeping

C. Don’t drink alcohol before sleeping.

D. Preventing the wind from blowing into your room.

3. To sleep well, you need to __________.

A. get up late on weekends

B. sleep during the day sometimes

C. avoid looking at your clock

D. have a bath in the morning

4.The text mainly about__________ .

A. some keys to a better night’s sleep

B. some advantages of having a good sleep

C. some effects of bad night’s sleep

D. some reasons for insomnia

高一英语阅读理解中等难度题查看答案及解析