Some caterpillars’ warning signals (信号) may h...

Some caterpillars’ warning signals (信号) may have evolved (进化) from walking. A team, writing in the journal Nature Communications, reported that the hair-like structures the living things use to make sounds evolved from legs.

The team studied caterpillars which use these structures to communicate their ownership of leaves. This means the caterpillars are able to “tell” strangers to go away without risking injury in fighting. “These are really interesting caterpillars,” said Dr. Jayne Yack from Carleton University in Ottawa, Canada, who led the research. “They make signals using hair-like structures which are on their back ends.”

The caterpillars drag these structures across the leaf to make scraping (刺耳的) sounds when strangers enter the area of their leaves. “When they make this signal, the strangers leave,” explained Dr. Yack. “It’s like saying ‘I’m here, get out of here — I already own this leaf’.”

The scientists looked at other species (物种) within the same group of caterpillars and created their “family tree”. They used chemical markers (标记物) to work out the relationship between the animals, showing which in the group were the more ancient species and which species evolved more recently. “Those more ancient species actually don’t have these sound-producing structures. They have legs that they use to walk towards strangers,” said Dr. Yack. These more ancient species, she explained, walk towards strangers and try to fight against them. “They can kill each other in the fighting,” Dr. Yack added. She said that the evolution of the scraping show had allowed the caterpillars to solve their fighting without injury. “So our idea is that these signals actually avoid harm to both sides — they solve fighting in a more ‘friendly’ way.”

The study also provides a map of an evolutionary process that many other biologists are researching.

1.What can we learn about caterpillars’ warning structures from the text?

A.They have the same use as hair.

B.They are found in caterpillars’ heads.

C.They are used to fight against strangers.

D.They may have evolved from caterpillars’ legs.

2.According to the text, Dr. Yack’s team did NOT ________.

A.draw a family tree of caterpillars

B.create a map to show how caterpillars evolve

C.study species within the same group of caterpillars

D.make clear the relationship between different species of caterpillars

3.What does the underlined word “They” in the fifth paragraph refer to?

A.The ancient species. B.The chemical markers.

C.The sound-producing structures. D.The more recently evolved species.

4.What is the main idea of the text?

A.How caterpillars evolved.

B.How caterpillars warn strangers.

C.Communication between caterpillars.

D.Caterpillars’ warning signals evolved from walking.

高一英语阅读理解中等难度题查看答案及解析

Many scientists have believed that there may be a ______ of life on the Mars.

A.signal B.sign C.mark D.sigh

高一英语单项填空中等难度题查看答案及解析

A new study gives us the warning that about thirty percent of the world's people may not have enough water by the year 2025.

A private American organization called Population Action International did the new study. It says more than three-hundred-thirty-five-million people lack enough water now. The people live in twenty-eight countries. Most of the countries are in Africa or the Middle East.

P-A-I researcher Robert Engelman says by the year 2025, about three-thousand-million people may lack water. At least 18 more countries are expected to have severe water problems. The demand for water keeps increasing. Yet the amount of water on Earth stays the same.

Mr. Engelman says the population in countries that lack water is growing faster than in other parts of the world. He says population growth in these countries will continue to increase.

The report says lack of water in the future may result in several problems. It may increase health problems. Lack of water often means drinking waters not safe. Mr. Engelman says there are problems all over the world because of diseases, such as cholera, which are carried in water. Lack of water may also result in more international conflict. Countries may have to compete for water in the future. Some countries now get sixty percent of their fresh water from other countries. This is true of Egypt, the Netherlands, Cambodia, Syria, Sudan, and Iraq. And the report says lack of water would affect the ability of developing to improve their economies. This is because new industries often need a large amount of water when they are beginning.

The Population Action International study gives several solutions to the water problem. One way, it says, is to find ways to use water for more than one purpose. Another way is to teach people to be careful not to waste water. A third way is to use less water of agriculture.

The report also says long-term solutions to the water problem must include controls on population growth. It says countries cannot provide clean water unless they slow population growth by limiting the number of children people have.

1.__________ are expected to have severe water problems by the year 2025

A．No countries       B．18 countries       C．46 countries       D．28 countries

2.All the following are true except____________.

A．Lack of water may cause conflict between countries

B．Egypt now has enough fresh water

C．There are solutions to the water problem

D．New industries need a lot of water

3.It can be inferred that _____________.

A．There is connection between providing clean water and slowing population growth

B．Lack of water may also result from international conflict

C．The ability of developing has nothing to do with lack of water.

D．It is not known whether diseases have something to do with lack of water

4.What is the solution to the water problem for a long time?

A．Not to waste water.                      B．Less developing industries.

C．Less international conflict.                 D．Control the population

5.The best title of the passage would be __________.

A．World Conflict                          B．Diseases and Water

C．World Water Shortage                   D．Population and Water

高一英语阅读理解中等难度题查看答案及解析

You may have had Chinese food in Chinese restaurants in your country.Have you noticed some differences that you may not know between Chinese and western eating?

1.Chopsticks vs.knives and forks.Chinese usually share their dishes with others.Chinese cooks usually cut everything into bite size pieces,thus people don't need knives to cut it,and just pick up their food with chopsticks.　 Westerners usually enjoy individual（个人的）servings1..

2.Seasoning bottles.2..But if you have breakfast at a dumpling and steamed bun shop,you can increase the flavor with soy sauce or vinegar from a bottle poured into a dipping dish.

3.3..Sweet desserts are served after western dinners,while Chinese have fresh fruit or tea for dessert.

4.Round tables vs.square tables.Chinese traditionally eat at round tables,particularly family meals,as it's convenient to share dishes with others,especially with a lady.Roundness symbolizes unity in China.4..

5.Cooking methods.Where westerners limit themselves to boiling,frying,roasting,and baking usually,Chinese use more methods of cooking,like steaming and quick-frying.5..However,westerners use more butter,sunflower oil,and olive oil.

Hopefully sharing these differences will help you prepare for your experience,and has given you some insights into Chinese and western culture.

A.Desserts.

B.Fresh fruit and tea.

C.Chinese usually use animal or peanut oil to fry food.

D.Chinese usually don't remove bones,and just cut them and the meat into pieces.

E.They cook food in big pieces and serve it with knives and forks for cutting it up.

F.You usually won't find any salt,pepper.or tomato sauce on the table in a Chinese restaurant.

G.Westerners eat at square tables,which is much easier for individual meals,with long tables for bigger groups.

高一英语七选五中等难度题查看答案及解析

Some of you may have finished unit one. _____ , you can go on to unit two.

A. If you may      B. If you do      C. If not       D. If so

高一英语单项填空中等难度题查看答案及解析

How to Feel Beautiful on the Inside

Public opinion may have some say in who is considered “beautiful” on the outside, but inner beauty takes on a whole other meaning. 1.. Learn what beauty means to you and have the confidence to live by your own rules starting today.

Ask yourself what beauty means to you. How do you define (定义) inner beauty? Is it a person who is always smiling? Someone who has kind words for everyone he meets? Or, is your definition of beauty more complex?2.. Take a pen and a notebook and write down some words that help you describe inner beauty.

Have confidence in who you are. In addition to stressing your character strengths, you can apply other ways to feel more confident.3.. This can be anything from making music to playing sports. Doing things you are good at builds self-respect.

Smile and laugh more.4., just arranging your face into a smiling expression can thoroughly change your mood. Smiles can lead to a more positive mood and a more hopeful attitude. It can not only make you feel beautiful inside, but also improve your outer beauty.

5.. A reliable method of developing your own inner beauty is adopting the habit of seeing the beauty in everything. All around you, there are amazing people, places and things. Make an effort to slow down and acknowledge these daily.

A. Notice the beauty around you

B. When you want to get the feeling of confidence

C. Even if you don’t quite feel up to it at the moment

D. Besides, you should try to laugh as much as possible

E. Take a moment to reflect on what beauty means to you

F. It has more to do with your character than your appearance

G. Frequently take part in activities in which you perform well

高一英语七选五中等难度题查看答案及解析

Having friends may well keep you healthier and help you deal with stress better. Some studies show that people with close friends have a greater ability to fight disease than people who are alone.

Place friendship in the first place. Find the time to be with friends even if it means letting the lawn go unmowed or the dishes unwashed for a while. When you can’t get together, use the phone to keep in touch.

Open up to close friends. Keeping a deep friendship requires a level of “heartfelt” intimacy (亲密).Don’t be afraid to express your inner fears and disappointments. Listen to your friends when they have problems，but offer advice only when it’s wanted. Help raise friends’ self­esteem when they are sad about a job loss, or other such events.

Have different friends for different activities, such as going to the movies，singing in a choir，and joining in a bowling league.

Don’t wait for a friend to ask for helps. When a friend has the flu，offer to go to the store or drive his or her children to their after­school activities.

Never take a friendship for granted. Like a good marriage，friendship needs care and patience. Become a joiner. Find a group that matches your interests.

Talk to strangers. Conversations started in museums, laundry rooms，or bookstores can lead to firm friendship.

Enroll in an adult­education course. A classroom is an ideal place to meet others with similar interests.

1.People with close friends have a________ ability to fight disease than people who are alone.

A． less   B． greater      C．poorer         D． little

2.According to the passage，you’d better offer advice to your friends________.

A． at any moment

B． only when they are happy

C． only when they want it

D． only when you are glad

3.What we should do to have friends according to the author?

A． Make friendship a priority.

B． Open up to close friends.

C． Never take a friendship for granted.

D． All the above.

4.Which of the statements is TRUE according to the passage?

A． You should have different friends for the same activities.

B． You should wait for a friend to ask a favor.

C． You should avoid talking with strangers in museums, laundry rooms, or bookstores.

D． You should never take a friendship for granted.

5.The underlined word “enroll” in the last paragraph means ________.

A． give  B． join   C． get    D． catch

高一英语阅读理解中等难度题查看答案及解析

Having friends may well keep you healthier and help you deal with stress better. Some studies show that people with close friends have a greater ability to fight disease than people who are alone.

Make friendship a priority (优先考虑的事). Find the time to be with friends even if it means letting the dishes unwashed for a while. When you can’t get together, use the phone to keep in touch. 洪都英语权所有www.hongduen.com！

Open up to close friends. Keeping a deep friendship requires a level of “heartfelt”intimacy(亲密). Don’t be afraid to express your inner fears and disappointments. Listen to your friends when they have problems, but offer advice only when it’s wanted. Help raise friends’ self-esteem when they are shaken by a job loss, or other difficulties.洪都英语权所有www.hongduen.com！

Have different friends for different activities, such as going to the movies, singing in a choir, and joining in a bowling league. 洪都英语权所有www.hongduen.com！

Don’t’ wait for a friend to ask a favor. When a friend has the flu, offer to go to the store or drive the children to their after-school activities.

Never take a friendship for granted. Like a good marriage, friendship needs care and patience. Become a joiner. Find a group that matches your interests. 洪都英语权所有www.hongduen.com！

洪都英语权所有www.hongduen.com！

Talk to strangers. Conversations started in museums, laundry rooms, or bookstores can lead to firm friendships.

Enroll in an adult-education course. A classroom is an ideal place to meet others with similar interests.

1.          People with close friends have a ________ ability to fight disease than people who are alone.

2.          According to the passage, you’d better offer advice to your friends ________.

3.          What we should do to have friends according to the author?

4.          Which of the statements is TRUE according to the passage?

5.          The underlined word “enroll” in the last paragraph means “________”.

高一英语阅读理解中等难度题查看答案及解析

Having friends may well keep you healthier and help you deal with stress better. Some studies show that people with close friends have a greater ability to fight disease than people who are alone.

Place friendship in the first place. Find the time to be with friends even if it means letting the lawn go unmoved or the dishes unwashed for a while. When you can’t get together, use the phone to keep in touch.

Open up to close friends. Keeping a deep friendship requires a level of “heartfelt” intimacy (亲密).Don’t be afraid to express your inner fears and disappointments. Listen to your friends when they have problems，but offer advice only when it’s wanted. Help raise friends’ self­esteem when they are sad about a job loss, or other such events.

Have different friends for different activities, such as going to the movies，singing in a choir，and joining in a bowling league.

Don’t wait for a friend to ask for helps. When a friend has the flu，offer to go to the store or drive his or her children to their after­school activities.

Never take a friendship for granted. Like a good marriage，friendship needs care and patience. Become a joiner. Find a group that matches your interests.

Talk to strangers. Conversations started in museums, laundry rooms，or bookstores can lead to firm friendship.

Enroll in an adult­education course. A classroom is an ideal place to meet others with similar interests.

1.People with close friends have a　　　　　　 ability to fight disease than people who are alone.

A. less　　　　　　　　 B. greater

C.poorer　　　　　　　　 D. little

2.According to the passage，you’d better offer advice to your friends 　　　　 .

A. at any moment

B.only when they are happy

C. only when they want it

D.only when you are glad

3.What we should do to have friends according to the author?

A. Make friendship a priority(头等大事）.

B.Open up to close friends.

C. Never take a friendship for granted.

D.All the above.

4.Which of the statements is TRUE according to the passage?

A. You should have different friends for the same activities.

B. You should wait for a friend to ask a favor.

C. You should avoid talking with strangers in museums, laundry rooms, or bookstores.

D. You should never take a friendship for granted.

5.The underlined word “enroll” in the last paragraph means 　　　　　 .

A. give　　　　 B. join　　 C. get　　 D. catch

高一英语阅读理解中等难度题查看答案及解析

Having friends may well keep you healthier and help you deal with stress better. Some studies show that people with close friends have a greater ability to fight disease than people who are alone.

Make friendship a priority. Find the time to be with friends even if it means letting the grass in your garden uncut or the dishes unwashed for a while. When you can’t get together, use the phone to keep in touch.

Open up to close friends. Maintaining a deep friendship requires a level of “heartfelt” intimacy (亲密). Don’t be afraid to express your inner fears and disappointments. Listen to your friends when they have problems，but offer advice only when it’s wanted. Help raise friends’ self-esteem (自尊)when they are shaken by a job loss, or other such events.

Have different friends for different activities, such as going to the movies，singing in a choir，and joining in a bowling league.

Don’t wait for a friend to ask a favor. When a friend has the flu，offer to go to the store or drive his or her children to their after­school activities.

Never take a friendship for granted. Like a good marriage，friendship needs care and patience. Become a joiner. Find a group that matches your interests.

Talk to strangers. Conversations started in museums, laundry rooms，or bookstores can lead to firm friendship.

Enroll in an adult­education course. A classroom is an ideal place to meet others with similar interests.

1. People with close friends have a ________ ability to fight disease than people who are alone.

A．less            B．greater        C．poorer          D．little

2. According to the passage，you’d better offer advice to your friends ________.

A．at any moment                    B．only when they are happy

C．only when they want it             D．only when you are glad

3. How many things have been mentioned that we must pay attention to in the passage to have friends?

A. 3              B. 4              C. 6             D. 7

4.Which of the statements is TRUE according to the passage?

A. You should have different friends for the same activities.

B. You should wait for a friend to ask a favor.

C. You should avoid talking with strangers in museums, laundry rooms, or bookstores.

D. You should never take a friendship for granted.

5.The underlined word “enroll” in the last paragraph means________.

A．give         B．join           C．get             D．catch

高一英语阅读理解中等难度题查看答案及解析