There are some injuries that are common to al...

There are some injuries that are common to all types of extreme sports. The following are some of the important things to do to prevent extreme sports injuries. 1. But they can definitely minimize the risk of injuries.

Warm up.

2. They include a combination of cardiovascular(心脏血管的)exercises, strength drills and stretching. Cardiovascular exercises increase body temperature, heart rate and blood circulation, which is required for further movement of the body. Strength drills increase the stamina of the body, while stretching warms up the muscles preparing them for sudden forceful movements. 3. It also plays an important role in boosting the team spirit for a team sport. A warm-up session should last for at least 20 minutes and it can extend up to half an hour.

Avoid overworking.

There are some people who do not exercise their body for the sport on a regular basis and perform a week's task in a day or two. 4. They do not realize the effect of overworking during the performance and keep doing it until they feel extremely tired. Apart from the actual sport, one should also avoid overdoing the warm-up exercises before the activity.

5.

Just as warming up is essential before any rigorous(充满活力的) physical activity, cooling down the body after playing a rigorous sport is also a significant part of physical conditioning. When you are done with your sports session, you can conclude with some walking, jogging or light running. Slight stretching exercises, focusing on specific muscles, will also be useful for cooling down the body.

A. Cool yourself down.

B. Look for a coach to train you.

C. These people are likely to suffer from extreme sport injuries.

D. However, there are no perfect methods which can assure you 100% safety.

E. Along with physical preparation, warming up prepares you mentally to begin a sport.

F. You should also be careful about your clothing selection for warmth and protection.

G. Warm-up exercises are very important before you begin any sports practice.

高二英语七选五中等难度题查看答案及解析

Dolphin or not a dolphin?That is the question!You see,there are several types of dolphins.Some are saltwater dolphins while others are river dolphins.

＂What are the 32 types of dolphins?"When people are asking the question,they are actually referring to the saltwater dolphins in oceans and seas.The river dolphins living in fresh water,are not included in these species.But what would be the answer in this case if we ask,"Dolphin or not a dolphin?"The answer would obviously be yes.River dolphins still belong to the dolphin family.

Among the 32 types of dolphins,some do not actually wear the word"dolphin”in their names,such as the tucuxi,while others actually have the word"whale"as part of their names even if they are not whales but in fact,belong to the dolphin family,for example, the melon-headed whale and the killer whale.So what would be the answer to the question＂dolphin or not a dolphin?"in these cases?It would be yes.All these species do belong to the dolphin family.

Another question that people ask is,"Are the sea animals that perform at aquariums all dolphins?"So,it always seems to come back to the question,"Dolphin or not a dolphin?"

Well the answer is no in this case.The sea animals that perform there are not all dolphins. The beluga which people tend to think belong to the dolphin family because they show what seems like a smile,like most dolphins,are in fact a species of the whale family.

Now that you read these facts about dolphins,you probably realize that certain sea animals may appear to be part of the dolphin species and that others seem to be part of the whale family,but in either case,it is not obvious and can be surprising when you identify a sea animal as being a dolphin or not a dolphin.That is the question!

1.What do we know about the majority of the dolphins?

A.They look like whales. B.They appear friendly.

C.They perform for audience. D.They live in fresh water.

2.What could be added about dolphins before the last paragraph if you were the author?

A.The living area. B.Dolphin training.

C.The eating habits. D.Further identification.

3.This article can be classified as_____.

A.popular science B.literary fiction

C.a travel diary D.a news report

高二英语阅读理解中等难度题查看答案及解析

_______ there are many different types of food, some animals spend their lives eating only one type.

A. Since　　　　　　　　 B. Unless

C. Once　　　 　　　　 D. While

高二英语单项填空中等难度题查看答案及解析

_______ there are many different types of food, some animals spend their lives eating only one type.

A. Since　　　　　　　　 B. Unless　　     　　　　 C. Once　　     　　　　　　 D. While

高二英语单项填空中等难度题查看答案及解析

All of us can give others a hand as long as we are willing to do so. Actually, there are some people doing kind things all the time. Spreading kindness, one good deed at a time, is Karla Gibson’s mission. “I wish everyone could join me. There are so many ____ things going on in the world; I mean every day,” said Karla.

Karla had the ____ and sense of duty in December of 2013. The single mother of three said she tended to feel depressed around the holidays, so she ____ to do something to cheer others up. She started a Facebook page and ____ her good deeds each day, from feeding the homeless to giving Easter gifts to the incarcerated (囚犯). She hoped to ____ others.

“We have to do something. Our ____ can make a difference in someone’s day. You ____ know when someone might be having their worst day, and then something like buying them a coffee can change their whole attitude,” Karla ____.

Karla’s greatest ____ so far had to do with coffee. On September 27th, Karla’s birthday, she went to her local Starbucks and gave the ____ $127 to pay for other people’s drinks. She sat at the end of the drive-through holding a ____ that read, “Have a great day.” She ended up ____ about 23 customers. “It was really fun. It was ____ one of the best birthdays ever.” she said. Her kindness that day didn’t go ____. One couple was so grateful that they surprised her with flowers and balloons to show their ____.

Karla’s acts of kindness have become a ____ affair. Her two sons are always ____ others. “Sometimes I’ll ask Kyle, ‘So, did you do anything extra nice today?’ and his answers are like ‘Somebody ____ something in the hallway and I picked it up’ or ‘I held the door for someone’, that kind of thing,” said Karla.

It’s because of Mom that the boys think it’s ____ to give a hand to others. “I think it’s a great idea of hers. It’s always nice to help someone out ____ they really need it,” said Karla’s 15-year-old son Chad.

1.A.good B.bad C.new D.casual

2.A.commitment B.appointment C.preference D.success

3.A.managed B.agreed C.hesitated D.decided

4.A.did B.mentioned C.shared D.missed

5.A.greet B.inspire C.introduce D.remember

6.A.kindness B.happiness C.stories D.sadness

7.A.still B.often C.never D.even

8.A.whispered B.explained C.reported D.replied

9.A.surprise B.challenge C.concern D.moment

10.A.cashier B.customer C.beggar D.secretary

11.A.mark B.sign C.symbol D.flag

12.A.paying for B.picking up C.paying off D.picking out

13.A.occasionally B.usually C.probably D.hardly

14.A.unoccupied B.unnoticed C.unorganized D.unquestioned

15.A.wisdom B.existence C.generosity D.appreciation

16.A.society B.love C.holiday D.family

17.A.encouraging B.inviting C.helping D.affecting

18.A.dropped B.bought C.found D.fell

19.A.strange B.lucky C.cool D.funny

20.A.after B.though C.unless D.when

高二英语完形填空困难题查看答案及解析

One type of fish is named salmon(大马哈鱼). There are many different kinds of salmon, but almost all of them mate(交配) in a very strange way. They are born in small, freshwater rivers. They live in the river for a year, and then swim downstream to a bigger river and eventually to the ocean very quickly. While they live in the ocean, salmon are silver coloured.

After several years at sea, the salmon grow very long and heavy. Then, as if by magic, they all begin to swim home. Each salmon somehow remembers where it was born and the very same area in the small river.

It is a long, difficult journey home. Once the salmon enter fresh, they stop eating. They also change colours. Some salmon turn red, other brown and grey, and some turn pink. Some salmon grow a large bulge on their back, called a hump. These salmon fight to swim upstream against the current of sometimes very to avoid bears, birds, and fishermen

Finally, the salmon that survive mate in the same river in which they were born. Then, after all that work, they die! These salmon still play an important role. Their dead bodies help to provide nutrition(营养) to the animals that live in and around the river When their eggs hatch, the cycle will start again.

1.Which of the following do salmon NOT do when they reenter fresh water?

A. They change colours.

B. They stop eating.

C. They grow bulges on their backs.

D. They grow teeth.

2.Inferring from the passage, why do salmon eat a lot while they are in the ocean? Because_______

A. they need to have enough energy to return home

B. they never stop swimming

C. they are afraid of bears

D. the different water makes them hungry

3.Salmon return to fresh water in order to _______.

A. mate

B. provide nutrition to other animals

C. mate and provide nutrition to other animals

D. make a difficult journey

高二英语阅读理解中等难度题查看答案及解析

There are several different types of fire departments. Some hire full-time paid firefighters and some are run entirely by volunteers.1., a firefighter must go through strict physical and academic training to ensure a strong knowledge of fire safety and the physical strength to handle the tasks required by member of a fire department.

Joining a fire department requires that both physical and written tests are passed with scores showing a thorough knowledge of fire safety.2..

The first step in joining a fire department as a paid firefighter is to submit an application as well as acquire the appropriate training. Usually firefighters must have a high school diploma, and some complete two-or-four-year programs in fire science at community colleges and universities. 3., and if a candidate already has connections at a fire department, he may apply for a position straight out of high school.

Once a candidate applies and is accepted for training at a fire department, he must then complete several weeks of training at the department’s training center.4.. When this is done, the candidate is sent to a fire company for a period of probation (实习). He has to continue training in the new position while being directed by experienced firefighters.5.. An application must be submitted to the volunteer fire department, then if the application is accepted, the candidate will take a training program and then be required to pass a physical and written test. Firefighters must also become certified (认证) as Emergency Medical Technicians (EMTs). The level of EMT certification is determined by the individual departments.

A.Although it is demanding

B.Whichever type is desired

C.However, an academic program is not required

D.For volunteer firefighters the procedure is similar

E.But joining a volunteer fire department is totally different

F.Training consists of classroom work and practical training

G.Also, a candidate must be able to respond quickly in emergencies

高二英语七选五中等难度题查看答案及解析

There are thousands of things to be sold that are of all colors and shapes in a supermarket, making you believe that they are good enough for you to have a try. How packaging(包装)is the quiet but persuading salesman?

There on the shelves，each bottle, can and box has been carefully designed to speak to the inner self of the consumer(消费者), so that he is buying not only a product but also his belief in life. Scientists have studied on this and found that the look of the package has a great influence on the “quality” of the product and on how well it sells, because “Consumers generally cannot tell between a product and its package. Many products are packages and many packages are products,” as Louis Cheskin, the first social scientist studying consumers’ feeling for packaging, noticed.

Colors are one of the best tools in packaging. Studies of eye movement have shown that colors draw human attention quickly. Take V8 for example. For many years，the bright red color of tomatoes and carrots on the thin bottle makes you feel that it’s very good for your body. And the word “green" today can keep food prices going up.

Shapes are another attraction．Circles often mean happiness, because they are pleasing to both the eye and the heart. That’s why the round yellow M sings of McDonald’s are inviting to both young and old.

This new consumer response(反应)to the colors and shapes of packages reminds(提醒)producers and sellers that people buy to meet the needs of both body and heart.

1.According to the passage, ______ seems to be able to persuade a consumer to buy the  product.

2.It can be inferred(推测)from the passage that V8 is a kind of________.

3.“And the word ‘green’ today can keep food prices going up” This sentence

suggests that consumers today are________.

4.What’s the best title of the passage?

高二英语阅读理解中等难度题查看答案及解析

Some problems are difficult to solve. But there are a lot of number expressions that can help. For example, if we put two and two together, we might come up with the right answer. We know that two heads are better than one. It is always better to work with another person to solve a problem. Some problems have only one solution. You cannot be of two minds over this. But with any luck，we can solve the problem in two shakes of a lamb’s tail. In other words，we could have our answers quickly and easily.

Sometimes we can kill two birds with one stone. That is, we can complete two goals with only one effort or action. But we must remember that two wrongs don’t make a right. If someone does something bad to you, you should not do the same to him.

If you are going out with your girlfriend，or boyfriend，but you don’t want another friend to go along on your date，you can just say to your friend: two’s company, three’s a crowd.

When I was a young child in school, I had to learn the three R’ s. These important skills are reading, writing and arithmetic. These three words do not all start with the letter “R”. But they have the sound of “R”. My teacher used to give three cheers when I did well in maths. They gave praise and approval for a job well done.

Some of my friends were confused and did not understand their school work. They were at sixes and sevens. In fact, they did not care if they finished high school. But they were happy when they completed their studies and graduated from high school. They were in seventh heaven. They were on cloud nine. Nine times out of ten students who do well in school find good jobs. Some work in an office doing the same things every day at nine-to-five jobs. You do not have to dress to the nines, or wear your best clothes, for this kind of work.

1.If you solve a problem without any difficulty, you can also say that you can do it　　　　　　 .

A. in seventh heaven　　　　 B. on cloud nine

C. at sixes and sevens　　 D. in two shakes of a lamb’s tail

2.When Tom wins first place in the game，we can congratulate him by using “ 　　　 ” according to the passage.

A. dress up to the nines

B. give three cheers

C. kill two birds with one stone

D. put two and two together

3.Which of the following has the similar meaning to “in all probability” ？

A. Two wrongs don’t make a right.

B. Two’s company, three’s a crowd.

C. Nine times out of ten.

D. Two heads are better than one.

4.What is the best title of the passage?

A. Interesting Number Expressions

B. The Importance of Numbers

C. Number Stories

D. Use Numbers

高二英语阅读理解中等难度题查看答案及解析

It’s known to us all that elephants are the biggest animals on land.

There are two kinds of elephants: African elephants and Indian elephants. The African elephant has a round head and very big ears. It has long teeth. Each of them can be as long as 3.4 meters and as heavy as 103 kilograms. African elephants live in forests in Africa. They eat leaves, roots and fruits.  Indian elephants are smaller than African elephants. They are found in forests in India, Malaysia and some other countries in South Asia. They live on grass. They can be trained to do a lot of heavy work and amuse(逗乐)people.

An African elephant lives as long as a man does. But an Indian elephant does not live that long.

Title: 1._____________——Biggest Animals on Land

高二英语其他题简单题查看答案及解析