If you stay in space for a long time, will yo...

If you stay in space for a long time, will your body change? Mark Kelly and Scott Kelly from the United States will show you the answer.

Mark and Scott are twins. They are both retired(退休的）NASA（美国国家航天航空局）astronauts. From 2015 to 2016,Scott spent 340 days at the international space station, while Mark stayed on the earth. People took measures of both men before, during and after the flight. They were helping with a NASA project which studies how long-term space travel influences the human body.

The full results of the study will come out in a year or two. But scientists are sharing some findings in the journal Nature.

A change in appearance was easy to see. Scott, when he returned to the earth, was 5cm taller before. Another change was that Scott's eyesight declined after he came back. He found he couldn't see clearly. He also found that he couldn't move his legs so easily like before. Scientist found that after coming back to the earth, he took a little longer to understand things and make decisions.

There were also changes that were much harder to see. As someone grows older, his telomeres(端粒）get shorter and become less effective to stop DNA from getting damaged. But during Scott's stay in space, his telomeres got longer while Mark's kept getting shorter.

Further tests on the twins are still going on.NASA plans to send people to Mars in the 2030s,and the twins' research could help them prepare for those space trips.

1.Which of the following is Not true about Scott?

A.He has a twin brother. B.He is from the United States.

C.He has never been to space before. D.He was once a NASA astronaut.

2.We can know that scientists did the research between the twins in order to_______.

A.see who is a better astronaut.

B.learn more about the twins' daily life

C.study how twin brothers act diferently in life

D.study how long-term space travel influences the human body

3.What does the underlined word“declined”mean in Chinese?

A.下降 B.漂浮 C.提高 D.控制

4.What didn't Scott experience while he returned to the earth?

A.He couldn't understand others as well as before. B.He could walk faster than before.

C.His telomeres became longer. D.He grew taller than before.

5.The last paragraph mainly tells us ____________.

A.the fun of space travel

B.the success of the twins' research

C.the full results of the twins' research

D.the purpse of the twins' research

九年级英语阅读单选中等难度题查看答案及解析

1.What's the purpose of staying active?

A.To carry more books. B.To make the body strong.

C.To avoid aches and pains. D.To cut down the times to visit the doctor.

2.Why should we take only two or three books home at time?

A.Because we don't need them at school.

B.Because too much weight might hurt our back.

C.Because someone else would carry the others for us.

D.Because we only need a few books at home.

3.What information can we mainly get from the poster?

A.We should have a healthy life. B.We should make plans for sports.

C.We should have a good eating habit. D.We should see the doctor often.

九年级英语阅读单选中等难度题查看答案及解析

---Do you know _____________________?

---Yes, for five days.

A. how long will your brother stay in Beijing

B. how long your brother will stay in Beijing

C. how soon will your brother go to Beijing

九年级英语单项填空困难题查看答案及解析

Tips for Keeping Your Body Healthy

It is not common for the human body to sit for a long time in the old days. But now sitting for a long time every day is common. Sitting for a long time is dangerous for your health. You can hurt your arms and your neck.1.

People who work in offices often have health problems. People who travel many hours on planes often say they feel bad at the end of a long trip. The following tips can help you if you don’t want any problems.

Sit correctly. Keep your back straight and your feet on the floor. It is very necessary to have a comfortable chair. 2..

Take breaks often. Don’t sit for more than thirty minutes.3.). Having a break can help you do more work in the day.

4.. Water cleans your body and keeps healthy. It’s good for you and gives you energy. But please don’t drink lots of coffee or tea.

Move your body. Stretching (拉伸) is a simple and quick way of moving your body while you are sitting down. Stretch your arms, your hands and your shoulders.5..

A. You can also hurt your back

B. Drink water

C. Stand up and have a break

D. Don’t stretch a lot if it hurts

E. The chair can help you sit correctly

九年级英语七选五中等难度题查看答案及解析

-I haven’t seen your parents for a long time. _________ will they come to see you?

-Maybe in about three days.

A. How long B. How often C. How soon D. How many days

九年级英语单选题中等难度题查看答案及解析

If you change the___ of the chairs and the apples, there will be more space in the office.

A.style B.material C.pattern D.position

九年级英语单选题中等难度题查看答案及解析

When you stay away from your home for a long time, you start to miss your good old bed, your good old parents. Believe it or not, you’re feeling homesick (想家的). You can help yourself to feel less homesick. Here’s how:

1. If you’re going away from home, bring your favourite pajamas (睡衣). You can also bring some pictures of the people who you may miss. You can look at them any time you want.

2.The busier you are, the less time you’ll have to feel homesick. Spend your free time on music, sports or books. Try to join in activities wherever you are.

3. You can make a plan for when you’ll call your mum or dad. You can also keep in touch with family and friends by emails or text messages.

4.Sometimes, telling someone that you’re feeling a little homesick will help you feel better. Maybe you can tell a friend that you feel homesick and the two of you can do something fun.

从A、B、C、D中选择正确的选项作为文章的小标题，填入第【1】~【4】四个空格中。

A. Keep yourself busy　　　　　　　　 　　　　　　　　　 　　　　　　　　　 　　　　　　　　　 B. Tell someone your feelings

C. Stay in touch　　　　　　　　 　　　　　　　　　 　　　　　　　　　 　　　　　　　　　 　　　　　　　　　 D. Bring something familiar with you

5.Which is the best title for the passage?

A. How to stay away from home　　　　 　　　　　　　　　 　　　　　　　　　 B. How to do something fun

C. How to feel less homesick　　　　　　 　　　　　　　　　 　　　　　　　　　 D. How to miss your home

九年级英语其他题中等难度题查看答案及解析

When you stay away from your home for a long time, you start to miss your good old bed, your good old parents. Believe it or not, you're feeling homesick (想家的). You can help yourself to feel less homesick. Here's how:

●________1.________ If you're going away from home, bring your favorite pajamas (睡衣). You can also bring some pictures of the people who you may miss. You can look at them any time you want.

●________2.________ The busier you are, the less time you'll have to feel homesick. Spend your free time on music, sports or books. Try to join in activities wherever you are.

●________3.________ You can make a plan for when you'll call your mum or dad. You can also keep in touch with family and friends by emails or text messages.

●________4.________ Sometimes, telling someone that you're feeling a little homesick will help you feel better.  Maybe you can tell a friend that you feel homesick and the two of you can do something fun。

从A、B、C、D中选择正确的选项作为文章第2-5段的小标题，并填入四个空格中。

A. Keep yourself busy.

B. Tell someone your feelings.

C. Stay in touch.

D. Bring something familiar with you

5.Which is the best title for the passage?

A. How to stay away from home

B. How to do something fun

C. How to feel less homesick

D. How to miss your home

九年级英语其他题中等难度题查看答案及解析

任务型阅读

When you stay away form your home for a long time, you start to miss your good bed, your good parents. Believe it or not, you’re feeling homesick. You can help yourself to feel less homesick. Here’s how:

　　 1.　　 If you’re going away from home, bring your favourite clothes, you can also bring some pictures of the people who you may miss. You can look at them any time you want.

　　 2.　　 The busier you are, the less time you’ll have to feel homesick. Spend your free time on music, sports or books. Try to join in activities whenever you are.

　　 3.　　 You can make a plan for when you’ll call your mom or dad. You can also keep in touch with family and friends by email or text messages.

　　 4.　　 Sometimes, telling someone that you’re feeling a little homesick will help you feel better. Maybe you can tell a friend that you feel homesick and the two of you can do something fun.

从A、B、C、D中选择正确的选项作为文章第2-5段的小标题，并填入四个空格中。

A. Keep yourself busy　　　　　　　　　　　　　　 B. Tell someone your feeling

C. Stay in touch　　　　　　　　　　　　　　　　　 D. Bring something favourite with you

5.Which is the best title for the passage?

A. How to Stay away from Home　　　　　　 　　 B. How to Do something Fun

C. How to Feel Less Homesick　　　　　　　　　 D. How to Miss Your Home

九年级英语任务型阅读中等难度题查看答案及解析

任务型阅读

When you stay away form your home for a long time, you start to miss your good bed, your good parents. Believe it or not, you’re feeling homesick. You can help yourself to feel less homesick. Here’s how:

1.　　 If you’re going away from home, bring your favourite clothes, you can also bring some pictures of the people who you may miss. You can look at them any time you want.

2.　　 The busier you are, the less time you’ll have to feel homesick. Spend your free time on music, sports or books. Try to join in activities whenever you are.

3.　　 You can make a plan for when you’ll call your mom or dad. You can also keep in touch with family and friends by email or text messages.

4.　 Sometimes, telling someone that you’re feeling a little homesick will help you feel better. Maybe you can tell a friend that you feel homesick and the two of you can do something fun.

从A、B、C、D中选择正确的选项作为文章第2-5段的小标题，并填入第71-74四个空格中。

A. Keep yourself busy

B. Tell someone your feeling

C. Stay in touch

D. Bring something favourite with you

5.Which is the best title for the passage?

A. How to Stay away from Home

B. How to Do something Fun

C. How to Feel Less Homesick

D. How to Miss Your Home

九年级英语任务型阅读中等难度题查看答案及解析