_______ there are many different types of foo...

_______ 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

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 varieties of programs in the TV station to ________ many different types of interests and tastes among the public.

A. attend to　　　　 B．appeal to　　　　 C．adjust to　　 D．adapt to

高二英语单项填空中等难度题查看答案及解析

What is cloning? Are there different types of cloning?

_____71____ Actually, there are different technologies which can be used for other purpose besides producing the genetic twin of another organism. A basic understanding of the different types of cloning is key to talking an informed stance on current public policy issues and making the best possible personal decisions. The following three types of cloning technologies are usually performed; recombinant DNA technology or DNA cloning, reproductive cloning, and therapeutic cloning.

___72_____

Scientists have been cloning animals for many years. In 1952, the first animal, a tadpole, was cloned. ___73_____ Since Dolly, researchers have cloned a number of large and small animals including sheep, goats, cows, mice, pigs, cats, rabbits, and a gaur. ____74____

Hundreds of cloned animals exist today, but the number of different species is limited. ____75____ Some species may be more resistant to somatic cell nuclear transfer than others. The process of stripping the nucleus from an egg cell and replacing it with the nucleus of a donor cell is a traumatic one, and improvements in cloning technologies may be needed before many species can be cloned successfully.

E.       Cloning is making a genetic copy of something else.

F.       Attempts at cloning certain species such as monkeys, chickens, horses, and dogs, have been unsuccessful.

G.       Before the creation of Dolly, the first mammal cloned from the cell of an adult animal, clones were created from embryonic cells.

高二英语信息匹配中等难度题查看答案及解析

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

语法填空：

There are __1.___ kinds of theme parks, with a different park for almost everything: food, culture, science, ___2.__, movies or history. Some of them ___3.___ having the biggest or longest roller coasters. __4.__ and whatever you like, there is a theme park for you.

In the fantasy __5.__ park of Disneyland, you may see Snow White or Mickey Mouse in a parade or on the street. Disneyland also has many exciting rides, from giant ___6.__ ships to terrifying free-fall drops. With all these __7.___, it is ___8.__ that tourism is increasing _9.__ there is a Disneyland. Dollywood, being one of the most ___10.__ theme park in the world, shows and celebrates America’s traditional southeastern culture.

高二英语语法填空中等难度题查看答案及解析

There are _________ kinds of theme parks , with a different park for almost everything :food ,culture , science ,cartoons,movies or history .

A. famous　　　 B. fantasy　　　 C.uniqe　　 D. various

高二英语单项填空中等难度题查看答案及解析