Scientists and doctors across the world have ...

Scientists and doctors across the world have done _____ research over the years, hoping to find a cure for cancer.

A. a great deal of　　 B. quantity of

C. quite a few　　　　　 D. a large number of

高二英语单项填空中等难度题查看答案及解析

Scientists across the world agree that this is an invention of ____ great significance, ____ invention that will greatly change human life.

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

高二英语单项填空简单题查看答案及解析

Have you heard of snake robots? Scientists and doctors are already using tiny snakes that coil through the human body armed with sharp surgical tools to perform operations on hearts, prostate cancer, and other diseased organs. The snake robots that carry tiny cameras, scissors and forceps, and even more advanced sensors are being developed.

The next generation of the robots will be wireless, and will explore inside your body on their own--- not attached to any cables. For now, they are powered by cables that humans control. Experts say the day is coming when some robots will roam around the body on their own. But the experts in robotics say the new creations work best when they are designed for very specific tasks.

Howie Choset has been researching and building robots, particularly snake robots. He believes that his snake robot and others like it can help reduce medical costs by making complex surgery faster and easier. Choset says his new design is smaller and more flexible than earlier models.

The size of surgical robots allows surgeons to operate with far less damage to the body, helping the patient heal faster. Choset has also built larger snake robots designed for search and rescue, or just exploration. They can climb poles and trees and then look around through a camera in the head and slither through places that humans cannot reach.

“ We sent our snake robots into these caves in the Red Sea to look for evidence of ancient Egyptian ships,” he said. “ To me, archeology is like search and rescue, but everyone has been dead for 5,000 years.”

The doctors are very excited about the potential for surgical robots to do things that humans can’t do. The variety of sensors available for surgical robots keeps expanding. As they get smaller, maybe one day they will be able to test chemicals or blood in the body, or even the electrical connections in nerves.

1.What can we learn from the first paragraph?

A．The doctors carry out surgery using snake robots mainly for heart disease.

B．The doctors are very satisfied with the new snake robots during surgery.

C．Snake robots are completely free of human control today.

D．Other supplementary appliances will be added to snake robots.

2.Which of the following is true, according to the passage?

A．Snake robots are only used in the medical field.

B．Snake robots can reduce the patients’ medical costs.

C．Scientists are uncertain about the prospects for snake robots.

D．Scientists are forced to spend a lot of time researching snake robots.

3.How can snake robots work best, according to the passage?

A．When they carry tiny cameras, scissors and forceps.

B．When they are operated by experienced doctors.

C．When they are given a wireless function.

D．When they are designed for particular tasks.

4.Why do we know about Howie Choset, according to the passage?

A．He thought snake robots of different sizes can be used for different types of surgery.

B．He thought patients’ pain had been slightly reduced with the help of snake robots.

C．He also made snake robots for search, rescue and exploration.

D．He is very interested in researching ancient Egyptian ships.

5.The writers attitude towards the new technology is ______.

A．optimistic         B．doubtful           C．objective          D．negative

高二英语阅读理解中等难度题查看答案及解析

Record fires sweeping across the Amazon this month have been grabbing global headlines as scientists and environmental groups are worried that they will aggravate climate change crisis and threaten biodiversity (生物多样性).

As the largest rainforest in the world, the Amazon is often called "the lungs of the world". It is also home to about 3 million species of plants and animals, and 1 million local people. The vast rainforest plays an important role in the world's ecosystem because they absorb heat instead of it being reflected back into the atmosphere. They also store carbon dioxide and produce oxygen, ensuring that less carbon is released, mitigating the effects of climate change.

"Any forest destroyed is a threat to biodiversity and the people who use that biodiversity," Thomas Lovejoy, an ecologist at George Mason University told National Geographic. "The overwhelming threat is that a lot of carbon goes into the atmosphere," he stressed. "In the midst of the global climate crisis, we cannot afford more damage to a major source of oxygen and biodiversity. The Amazon mu:st be protected/5 U.N. Secretary General Antonio Guterres said.

Data from the National Institute for Space Research (INPE) show that the number of forest fires in Brazil quickly increased by 82 percent from January to August this year from a year ago. A total of 71,497 forest fires were registered in the country in the first eight months of 2019, up from 39,194 in the same period in 2018, INPE said. "We estimate that the forest areas in the Brazilian Amazon have decreased something between 20 and 30 percent compared to the last 12 months," Carlos Nobre, a researcher at the University of Sao Paulo, told German broadcaster Deutsche Welle.

Brazil owns about 60 percent of the Amazon rainforest, whose degradation could have severe consequences for global climate and rainfall. The extent of the area ruined by fires has yet to be determined, but the emergency has transcended (超出)Brazil's borders, reaching Peruvian, Paraguayan and Bolivian regions.

1.Which of the following best explains "mitigating” underlined in Paragraph 2?

A.Worsening. B.Causing. C.Easing. D.Benefiting.

2.What can we learn from Thomas's and Antonio's words?

A.The biodiversity makes the rainforest unique.

B.The rainforest fires result in serious consequences.

C.The global climate crisis brings more rainforest fires.

D.The dry weather leads to the rainforest fires.

3.Why does the author list the numbers in Paragraph 4?

A.To present the reduction of rainforest areas.

B.To show the influence of forest fires.

C.To explain the process of the research.

D.To prove the importance of rainforest.

4.Which section of a magazine is this text probably taken from?

A.Sports and music. B.Science and technology.

C..Business and culture. D.Nature and geography.

高二英语阅读理解中等难度题查看答案及解析

Scientists in Argentina have created the world’s first cow with two human genes that will enable it to produce human-like milk.

Genetic engineering was used to introduce the "mothers’ milk" genes into the animal before birth, according to the National Institute of Agribusiness Technology in Buenos Aires.

As an adult, the cloned cow "will produce milk that is similar to that of humans", which will prove "a development of great importance for the nutrition of infants(婴儿)", said the institute. "The cloned cow, named Rosita ISA, is the first in the world with two human genes that contain the proteins present in human milk," said the statement.

In April, scientists in China published details of research showing that they had created dairy cows which produced milk containing proteins found in human breast milk. But the Argentine team said the Chinese only introduced one human gene, while their research involved two, meaning the milk will more closely resemble that of humans.

“Our goal was to raise the nutrition value of cows’ milk by adding two human genes, which do good to the immune system of infants,” said Adrian Mutto, from the National University of San Martin which worked with the institute.

Cristina Kirchner, President of Argentina, said that the scientific institute made all Argentines proud. She also said that she had refused the "honor" of having the cow named after her. "They came to tell me that the name is Cristina, but what woman would like to have a cow named after her? It appeared to me to be more proper to call it Rosita.”

1.What is the passage mainly about?

A. The importance of genetic engineering.

B. Ways to improve mothers’ milk.

C. Advanced agricultural technology in Argentina.

D. A cloned cow to produce human-like milk.

2.Which of the following can best replace “more closely resemble” in Para 4?

A. have more varieties than

B. have more nutrition than

C. be more similar to

D. be more different from

3.What can be inferred from Cristina Kirchner’s statements?

A. She was quite satisfied with the research done by the institute.

B. She considered it an honor to name the special cow.

C. She felt it improper to be named after the cow.

D. She refused to give a name to the cow out of self-respect.

4.What’s Adrian Mutto’s attitude to the genetic engineering?

A. negative　　 B. supportive

C. indifferent　　 D. mixed

高二英语阅读理解中等难度题查看答案及解析

It will be many years ______ the doctors and medical scientists can find _____ for cancer.

A . since; cures              B. when; treatments

C. before; cures             D. until; treaments

高二英语单项填空简单题查看答案及解析

It will be many years ______ the doctors and medical scientists can find _____ for cancer.

A.since; cures B.when; treatments

C.before; cures D.until; treaments

高二英语单项填空中等难度题查看答案及解析

The following "green" hotels from across the world offer guests an eco-friendly and world-class holiday experience.

Hi Hotel, Nice, France

Offering a private beach and rooftop pool, the Hi Hotel Eco Spa Beach has received Green Globe certification for using recycled paper, organic(有机的)paint, eco-friendly cleaning products and organic food.

Garonga Safari Camp, Phalaborwa, South Africa

A high-class 12-bed camp in South Africa, the hotel supports the local community. Locals are offered employment opportunities, with potential for career development, while food and goods are sourced locally where possible. Additionally, guests are invited to offset their carbon footprint by helping with the planting and growing of Spesbok Trees in the Eastern Cape.

Park Hyatt Maldives Hadahaa, Maldives

Park Hyatt Maldives Hadahaa combines environment and modern design to offer guests the luxurious experience. Various parts of the hotel are built over the water in the Indian Ocean in order to reduce interference(干扰)with the natural environment.

The Park Hyderabad, Hyderabad, India

Located within a 10-minute car ride from the centre of Hyderabad. The Park Hyderaba's exterior(外部)makes full use of natural light, reducing the need for electricity. Green transportation, bikes and electric cars, is encouraged.

Spice Island Beach Resort, St. George's，Grenada

Owned and run by Sir Royston Hopkin and his family, Spice Island Beach Resort is a luxurious destination for guests hoping to bathe in the natural beauty of the Isle of Spice. It uses solar heating and all forms of energy conservation. Smoking of any kind is forbidden in the areas or the hotel.

1.What's special about Hi Hotel?

A.It puts a ban on cars.

B.It provides green food.

C.It encourages guests to plant trees.

D.It offers employment opportunities to the locals.

2.How does Park Hyatt Maldives Hadahaa protect the environment?

A.It is partly built over the sea. B.It has simply-decorated rooms.

C.It makes full use of natural light. D.It uses eco-friendly cleaning products.

3.Which hotel bans smoking?

A.Hi Hotel. B.The Park Hyderabad.

C.Garonga Safari Camp. D.Spice Island Beach Resort.

高二英语阅读理解简单题查看答案及解析

Louis Pasteur

Louis Pasteur, one of the world's great scientists, was born in 1822, and died in 1895.While still a young boy, Louis Pasteur made his decision to become a scientist. He spent much of his life time studying the diseases of cattle, chickens and other tame animals. His wife learned to help him with his work. Almost everyone knows that Pasteur is the man responsible for finding a way of preventing milk from spoiling (变质). Not many people know he was the first to imagine and to prove that air we breathe is full of germs (细菌).  One of his greatest successes was finding a treatment for people and animals to prevent a disease called rabies (狂犬病). Louis Pasteur won many honors and could have got large amount of money. But Pasteur preferred to live simply. The real happiness of this unusual man came from his work. Louis Pasteur did so well in his life that the French government took up his work and created the Institute Pasteur in the year 1888.

1.According to the passage, which of the following statements is true?

2. From the passage, we know that Pasteur lived a simple life. This is because ________.

3.Why were many honors given to Louis Pasteur?

4. Pasteur could have got large amount of money if he had___________.

5.To Louis Pasteur the real happiness in his life was to __________.

高二英语阅读理解中等难度题查看答案及解析

The news inspired the whole world______ Israeli scientists have invented a kind of magic glasses_________ can let the blind see things.

A. that; what　　　　 B. which; that　　　　　 C. what; that　　　　 D. that; which

高二英语单项填空中等难度题查看答案及解析