A killer whale at Sea World Orlando jumped ou...

A killer whale at Sea World Orlando jumped out of its tank on Wednesday and fatally attacked a worker as horrified visitors________.

A. has been looking up      B. looked on        C. had looked off       D. was looking in

高二英语单项填空中等难度题查看答案及解析

Orcas, or killer whales, are the largest of the dolphins and one of the world’s most powerful animals feeding on meat. They feast on marine mammals such as seals, sea lions, and even whales, employing teeth that can be four inches (ten centimeters) long. They are known to grab seals right off the ice. They also eat fish, squid (鱿鱼), and seabirds.

Though they often frequent cold, coastal waters, orcas can be found from the polar regions to the Equator (赤道).

Killer whales hunt in deadly groups, family groups of up to 40 individuals. There appear to be both permanent and temporary group populations of killer whales. These different groups may hunt different animals and use different techniques to catch them. Permanent groups tend to prefer fish, while temporary groups target marine mammals. All groups use effective, cooperative hunting techniques that some are similar to the behavior of wolf packs.

Whales make a wide variety of communicative sounds, and each group has various noises that its members will recognize even at a distance. They use echolocation (回波定位) to communicate and hunt, making sounds that travel underwater until they meet objects, then reflect back, showing their location, size, and shape.

Killer whales are protective of their young, and other adolescent females often assist the mother in caring for them. Mothers give birth every three to ten years, after a 17-month pregnancy.

Killer whales are immediately recognizable by their special black-and-white coloring and are the intelligent, trainable stars of many aquarium shows. Killer whales have never been widely hunted by humans.

1. Killer Whales do not feed on ______.

A. seabirds　　 B. seals　　　 C. fishes　　 D. seaweeds

2.【The following aspects about killers whales are mentioned except ______.

A. hunting　　 B. communication　　 C. weight　　 D. habitats

3.We can conclude that ______.

A. people can find killer whales everywhere around the world

B. killer whales live in different groups and never live alone

C. by making sounds killer whales hunt and communicate

D. humans’ hunt has made killer whales being endangered

4.Killer Whale are often seen in some aquarium shows because ______.

A. they are able to be trained

B. they have special body colors

C. they must be protected

D. they have never been hunted

高二英语阅读理解中等难度题查看答案及解析

I was 16 1. I began work in June 1902 at the whaling station. I heard of the killers that every year helped whalers catch huge whales. I thought, at the time, that this was just a story till then I witnessed it 2. my own eyes many times.

At the 3.(one)afternoon I arrived at the station, I was experiencing one　 hunting 4.(excited).I heard a loud noise come from the bay. We ran down to the shore. Without 5. (pause)we jumped into the boat. Using 6. telescope we could see that something was happening.The sea was so rough that day that it was difficult 7. (handle) the boat. Suddenly ,James fell into the sea. From his face, I could see he was.8. (terrify). Then I saw a shark, 9. swam towards James . Thank godness! James 10. (hold) up by Old Tom back to the boat at last.

高二英语短文填空中等难度题查看答案及解析

.

Within a moment, its body _______ swiftly by the killer down into the depths of the sea.

高二英语单项填空简单题查看答案及解析

Have you ever heard of the Coral Sea? It is home to an amazing variety of turtles, sharks, whales, dolphins, large fish, birds, corals, plants, and many other species. Many of these species are endangered elsewhere in the world, but still survive in the healthy environment of the Coral Sea.

The Coral Sea is a large series of coral reefs located off the northeast coast of Australia. This area is three times larger than Australia’s famous Great Barrier Reef, which the Coral Sea borders.

The Coral Sea is one of the few coral reef environments that have remained largely undamaged by over-fishing, oil and gas exploration and pollution. However, statistics show that coral reefs around the world are disappearing five times faster than rainforests. It is very likely that in the near future the Coral Sea will face the same threats to its existence.

The Australian government is currently looking at options for protecting the Coral Sea but has made no decisions. Environmentalists are pushing for laws to declare the Coral Sea area a marine protected area, which will mean a large “no-take zone” for fishermen, a no-exploration zone for gas and oil companies and a no-dump zone for pollution, possibly making the Coral Sea a marine park larger than any other in the world.

We can write letters to Australian leaders, Australian environmental protection agencies, and Australian friends, to let them know that people worldwide support this protection of the Coral Sea. To lose this last great marine wilderness world would be a loss for the whole world.

1.According to the passage, why should we protect the Coral Sea without any delay?

A. Because the Coral Sea, home to many species, will disappear soon.

B. Because the Coral Sea is rich in natural resources like oil and gas.

C. Because the Coral Sea is three times larger than Great Barrier Reef.

D. Because the Coral Sea will be a marine park larger than any other in the world.

2.Once the Coral Sea area is declared n marine protected area by law, 　　　　 .

A. it will surely become the largest marine park all over the world

B. no one will be allowed to there to have a dose look any more

C. from time to time people can still dump their rubbish around there

D. over-fishing, oil and gas exploration will be banned altogether there

3.What is the attitude of the author towards the protection of the Coral Sea?

A. Objective.　　 B. Favorable.

C. Doubtful.　　 D. Negative.

高二英语阅读理解困难题查看答案及解析

_____ by the killers whales, the whalers were able to make a successful kill.

A. To help out  B.  Helped out  C. Helping   D. Being helped out

高二英语单项填空中等难度题查看答案及解析

It was a time_______ the killer whales helped the whalers catch the baleen whales.

A. when        B. that        C. then         D. which

高二英语单项填空简单题查看答案及解析

Heart disease is one of the major killers in the world today. Many who suffer from it must have heart transplants. However, it’s difficult to get a suitable heart donation, and even if a patient survives the wait, his or her body often rejects the heart.

But there is now new hope for sufferers of heart disease. According to a study published in the journal Advanced Science, researchers from Israel’s Tel Aviv University printed a 3D human heart on April 15.

“This is the first time anyone anywhere has successfully engineered and printed an entire heart,” professor Tal Dvir told CNN. Unlike the previous 3D-printed heart structure, the new heart is complete with cells, blood vessels, chambers and other structures a heart needs to function normally. But scientists still have more to figure out before the 3D-printed heart can be fitted into the body. For one thing, the experimental heart is only the size of a thumb. And, although it can contract like a muscle, it cannot pump out blood like a real one. At present, the heart prototype is like a tiny airplane that has all of the right parts, but can’t fly.

However, the development is still regarded as a major breakthrough in medicine.

In the experiment, the researchers turned human fat tissue into human heart tissue with stem cell technology. The tissue was then turned into “bio-ink” for a 3D printer to ensure that tissue in the heart came from the patients themselves. So ideally, if it were to be placed in the body of someone in need of a transplant, there would be less risk of organ rejection. “Patients will no longer have to wait for transplants or take medications to prevent their rejection,” researchers told USA Today. “Instead, the needed heart　 will be printed, fully personalized for every patient.”

But the scientists think that 3D printing can be used to create other human organs. They foresee a time when the 3D printing of organs will be an everyday medical practice. “Maybe, in 10 years, there will be organ printers in the finest hospitals around the world and these procedures will be conducted routinely,” Dvir said.

1.Why do scientists have to do further research before fitting the 3D-printed heart into the body?

A.Because the heart is incomplete.

B.Because the heart can’t pump out blood.

C.Because the heart is an airplane that can’t fly.

D.Because the heart can’t contract like a muscle.

2.What can we infer from the last two paragraphs?

A.The needed heart will be printed to meet every patient’s need.

B.The 3D printing of organs will be an unusual medical practice.

C.Dvir has a negative attitude towards the future of organ printers.

D.Patients will need medicines to stop their rejection for their heart transplant.

3.What can serve as the best title for the passage?

A.Organ printers in the hospitals.

B.How to get a suitable heart donation.

C.Heart disease: one of the major killers.

D.A 3D-printed heart: new hope for heart disease sufferers.

高二英语阅读理解简单题查看答案及解析

As we drew closer, I could see a whale ____________ by a pack of about six other killers.

A. attacking         B. being attacked       C. attack       D. to attack

高二英语单项填空简单题查看答案及解析

Jumping out of ____ airplane at ten thousand feet is quite _____ exciting experience.

A. / ; the    B. / ; an    C. an; an    D. the; the

高二英语单项填空中等难度题查看答案及解析