New research shows the number of suicide（自杀）i...

New research shows the number of suicide（自杀）is increasing among young people. Between 2007 and 2015, the number of U. S. teenagers who visited hospitals because of suicidal thoughts or ideas doubled. In 2007, the number of visits was 580,000; by 2015, that number had increased to 1.12 million, reports CNN.

The fact that so many young people fight with depression （沮丧） and suicidal thoughts every day is shocking. But new research may allow us to look into the differences between the development of depression in boys and girls.

Researchers found that there are big differences between the development of depression for boys and girls. Girls seemed to develop depression at a faster speed and hit the highest levels of depression at an earlier age. For boys, the most rapid increase of depression happened at age 16. 4, while girls' biggest increase came at 13. 5 years.

There's no exact answer for these differences. But expert Arash Emamzadeh says that a general increase in depression during teenage time is possibly "because teenagers face many changes during this period such as puberty(青春期) , school transition(过渡) and forming friendships. "

As for girls experiencing depression at an earlier age, Emamzadeh writes, "One possible explanation for this difference is the earlier puberty in girls compared with boys. "

Finding a solution is not easy. However, if schools, parents and teenagers make efforts at the same time, things will certainly be better. Students in schools need to be helped to deal with problems both in their daily lives and study. Less stress is supposed to be put on teenagers' shoulders by parents. Proper communication between teenagers and parents is necessary. Teenagers should keep optimistic and look on the bright side of life.

1.How many teenagers with suicidal thoughts are there in the U. S. by 2015?

A.1.120,000. B.1, 700,000. C.580,000. D.540,000.

2.What is the Chinese meaning of the underlined word "optimistic" in the last paragraph?

A.健康的 B.沮丧的 C.乐观的 D.理性的

3.Which of the following is NOT TRUE?

A.There are big differences in the development of depression in boys and girls.

B.Boys reach the highest level of depression 2. 9 years earlier than girls.

C.Teenagers' depression increases probably because they face many challenges.

D.The reasons why there are differences in depression between boys and girls are not clear.

4.The writer's opinion to deal with teenage depression is that ____________.

A.nothing should be done because the problem will disappear itself

B.more subjects need to be there in school so that students have no time to think about their lives and friendships

C.teenagers should try to solve the problems by themselves in order to improve themselves

D.schools and families should work together to make things better and better

5.The purpose of the passage is ________________.

A.to tell people the teenage suicide and the possible solutions

B.to tell people the difference of the depression in boys and girls

C.to tell people why girls develop depression earlier and faster than boys

D.to tell people the suicide in teenagers is not that serious

九年级英语阅读单选困难题查看答案及解析

It’s no secret that reading is helpful. But can it help kids lose weight? In the first study to look at the influence of literature (文学) on overweight teenagers, researchers at Duke Children’s Hospital discovered that reading the right type of novel may make a difference.

The Duke researchers asked overweight girls aged 9 to 13 who were already in a weight loss program to read a novel called Lake Rescue. It was carefully created with the help of pediatric experts (儿科专家) to include specific healthy lifestyle and weight management guidance, as well as positive messages and strong role models.

Six months later, the Duke researchers found the 31 girls who read Lake Rescue experienced a significant decrease (fall) in their BMI scores (-.71%) when compared to a control group of 14 girls who hadn’t (+.05%), explained Alexandra C. Russell, a fourth-year medical student at Duke who led the study.

“As a pediatrician, I can’t count the number of times I tell parents to buy a book that might provide useful advice, yet I’ve never been able to point to research to back up my recommendations,” says Sarah Armstrong, director of Duke’s Healthy Lifestyles Program where the research took place. “This is the first probable interventional (介入的) study that found literature can have a positive influence on healthy lifestyle changes in young girls.”

Obesity is becoming more widespread in children, according to the CDC (Centres for Disease Control), which reports that 16 percent of children aged 6 to 19 are overweight or obese, a number that has increased since 1980. Researchers are looking at a lot of ways to help kids stay healthy, lose weight and be more active, but Armstrong says, “most don’t work very well. The weight loss choices that are effective typically involve taking powerful medications with side effects, or require long-lasting surgical procedures.”

While the BMI decrease due to the book is small, Armstrong says any decrease in BMI is encouraging because BMI typically increases in children as they grow and develop. That’s okay as long as it follows a normal, progressing curve. In overweight kids, however, BMI usually increases more quickly. “If their BMI percentile (百分位) goes down, it means they are either losing weight or getting tall and not gaining weight. Both are seen as positive signs in kids who are trying to lose weight,” she explains.

1.The underlined phrase “back up my recommendations” probably means“_________ ”.

A.influence my research B.change my opinion

C.respect my study D.support my advice

2.Which of the following statements about the research is TRUE?

A.The researchers interviewed the girls and studied information.

B.Pediatric experts offered specific guidance to the research.

C.16 percent of children aged from 9 to 13 were overweight.

D.The girls read a certain novel and gave their reports.

3.What’s the finding of the research?

A.That the girls all grew tall and lost weight after 6 months.

B.That the girls showed great interest in reading literature works.

C.That the girls who read Lake Rescue had a decrease in BMI.

D.That the girls needed to take powerful medications to lose weight.

九年级英语阅读单选中等难度题查看答案及解析

阅读填空

Each year there is an increasing number of cars on roads and streets as millions of new cars are produced．One out of every six Americans works at putting together the parts of cars, driving trucks, building roads or filling cars with gas．American won't live without cars!

Most Americans find it hard to think what life would be like without a car．However, some have realized the serious problem of air pollution by cars．The polluted air is poisonous(有毒的)and dangerous to health．

One way to get rid of(排除)the polluted air is to build a new kind of car．That's what several of the large car factories are trying to do．But progress in this field has been slow．

Another way is to take the place of the car engine(发动机) by something else．Engineers are now working on some new cars．Many makers believe that it will take years to develop a practical model that satisfies man．

To prevent the world from being polluted by cars, we'll have to make some changes in the way of us live．Americans, for example, have to cut down on the number of their cars．They are encouraged to travel and go to work by bike．Riding a bike is thought to help keep the air clean．

But this change does not come easily------a large number of workers may find themselves without jobs if a car factory closes down．And the problem of air pollution would become less important than that of unemployment(失业)．

九年级英语任务型阅读中等难度题查看答案及解析

A

Junk e-mail

A new UK study shows that around the world, junk e - mails(垃圾邮件)use 33 billion kilowatt(千瓦) hours of electricity a year. That 's enough energy to power 2.4 million homes.

E-mail users spend nearly 4/5 of their energy in removing junk e -mails and looking for useful e-mails.

Soccer schools

China is to built 20,000 soccer schools across the country in three years. It's to fight obesity(肥胖)and improve China's national soccer team. All students at these soccer schools will have one

soccer class each day. They'll also take part in competitions.

1.The electricity that junk e-mails use a year around the world can power __________ homes.

A.33 billion B.2.4 million C.2.4 billion D.20 thousand

2.China is going to build some soccer schools to__________.

A.let students have more fun B.increase the number of students

C.have more soccer teams D.improve children s health and China’s soccer team

九年级英语阅读单选中等难度题查看答案及解析

White-furred animals are in danger of dying out. Climate (天气) change is causing a fall in snow cover, leaving them exposed (暴露的), a new study suggests.

Scientists in Poland have been following the worrying case of the white-coated weasel (白鼬), which sheds (褪去) its brown covering in the winter for a milky coat in order to blend easily into its icy environment.

But researchers have discovered that between 1997 and 2007 the number of days with snow cover was from 80 to 40 in Bialowieza Forest, Poland. It means that the little animals are caught out in a completely unsuitable environment, where they can be caught by foxes and crows. Scientists found that on days when there was little winter snow cover. The number of white-coated weasels they managed to catch fell to as low as 20 percent of the total. It meant that the rest had been killed.

The problem is likely to affect other white-furred animals such as the Arctic fox when the snow cover increasingly gives way to a landscape (风景) of greens and browns.

In the near future white weasels may disappear completely from many areas of Northern Europe and America. They will either be replaced by brown ones or they will evolve (进化).

Researchers also carried out tests using toys of brown and white-coated weasels to see if the colors were actually making a difference to predators (捕食者). They found lots of animals had come near to the white toys, but none had shown interest in the brown toys.

The researchers are hopeful the animals will learn to adapt (适应), but say they cannot rule out the animals disappearing completely.

1.写出划线单词them指代的内容。

__________________________

2.回答问题：Why does the weasel change its brown covering into white when winter comes?

__________________________

3.根据短文内容填空，第(1)题不超过3个词，第(2)题限填1词。

(1) White-furred animals are in danger of dying out because of _______________.

(2) In Bialowieza Forest, the number of days with snow cover reduced (减少) by ______ percent between 1997 and 2007.

4.选出划线短语rule out的意思。

A.give up B.imagine C.control

5.给短文拟一个恰当的题目，不超过8个词。

__________________________

九年级英语多任务混合问题中等难度题查看答案及解析

North American black bears are shy animals. They are fearful by nature, and will usually run away if they see or hear people. Because of this, it can be difficult for scientists to learn about these animals.

In order to study black bears, researchers from New Jersey, USA, catch bears and use drugs（毒品）to help them go to sleep. Researchers then work out the size and the weight of the bear, take blood to test for diseases（疾病）, remove a tooth and take it to the lab to find out its age. From these studies, researchers want to find out how many bears live in New Jersey, how long they live, and how many babies they produce.

But in Minnesota, USA, researchers study bears that are completely awake. The bears know the researchers’ voices and they are not afraid of the research team. With the help of a few grapes to keep the bears busy, researchers can touch them to check their hearts, look at their teeth, and do other jobs. Researchers can also walk or sit with bears for hours and make videos to learn about their everyday lives.

In both places, the main purpose is the same— to make sure there is a healthy population of black bears. But the research methods and the kinds of information that researchers are able to collect are quite different.

1.In the first paragraph, we can learn that North American black bears are ______.

A.shy and fearful animals B.not found today

C.well known to scientists D.not afraid of people

2.The word “remove” in the second paragraph probably means ________.

A.pull out B.clean up C.fix up D.pick out

3.Which of the following is NOT included in the New Jersey studies on bears?

A.The age.

B.The way of their communication.

C.The weight.

D.The number of babies they produce.

4.What do the two studies have in common?

A.Research places. B.The main purpose.

C.Research methods. D.Collected information.

九年级英语阅读单选中等难度题查看答案及解析

The British are known as people who love to stand in line, but a new research shows that the British are only about average (平均数) at waiting politely in a queue(排、队). The French are the best. It's the Germans who don't have a good habit of standing in line. They can't stand to wait for anything. They begin to shout loudly and noisily if the line doesn't seem to be moving fast enough. Sadly it never moves fast enough for them.

The experts studied 940 people across Europe. They watched secretly as they waited in line to get tickets, to order fast food and to wait for the bus. They found people who are good at forming (排成) queues feel that they move along faster. For example, in Britain, the average waiting at a queue needs about three and a half minutes. In Germany or Sweden people hate waiting in line. In fact, people spend double the time as the British in queues. They get to the front of the queue without thinking about others, so they waste others' time.

The expert who did the research had asked a person to break into a queue to see what people would do. In Britain, people shouted loudly at him, but when he said," I' m terribly sorry. I didn't realize there was a queue. Do go before me. " People smiled and said. "Oh, that's all right, one more won't matter much. "It was also found in France, where 80％ of the people didn't mind standing in line only if they were treated politely. While in Germany everyone was angry and wore an unhappy face. The expert said, "If only they could learn from the British and the French to think of queuing as an exercise in making the best of an unhappy thing, they might find that the queue then moves faster."

1.The research shows that the people in __________ are the most polite in standing in line.

A. Sweden　　 B. Britain　　 C. France　　 D. Germany

2.The Germans spend more time than the British in queues because they __________.

A. always talk a lot with others　　 B. like waiting in line

C. don't follow the rule of queuing　　 D. don't know the rule of queuing

3.According to the research, which of the following is TRUE ?

A. The British didn't care about the queue jumper.

B. The Germans were angry with the queue jumper.

C. The French treated the queue jumper badly.

D. The Swedish enjoyed themselves while queuing.

4.From the last sentence we know the expert wished the Germans could__________.

A. have a good habit of standing in line　　 B. save others' time while queuing

C. move quickly when queuing　　 D. take exercise in queues

5.The result of the research shows that__________.

A. people in Europe hate waiting in line

B. standing in line is a kind of exercise

C. there are always queue jumpers all over the world

D. people who are good at standing in line think they move along faster

九年级英语阅读单选困难题查看答案及解析

A number of visitors _____ visiting the West Lake and the number of the visitors _____ increasing.

A.are; is B.is; are

C.are; are D.is ; is

九年级英语单选题中等难度题查看答案及解析

　　　　　 number of volunteers took part in the event，and the number of them increasing now．

A．The；are　　 B．A；is

C．The；is　　　 D．A：are

九年级英语单项填空简单题查看答案及解析

The number of the students in our school 　　　　 　　 increasing now and a number of them　　　　 abroad.

A. are, has traveled　 B.is, have traveled

C. are, traveled　 　　 D. is, has traveled

九年级英语单项填空简单题查看答案及解析