By the end of the century, if not sooner, oce...

By the end of the century, if not sooner, oceans will be bluer and greener thanks to a warming climate, according to a new study.

At the heart of the phenomenon lie tiny marine microorganisms(海洋微生物)called phytoplankton. Owing to the way light reflects off the organisms, these phytoplankton create colorful patterns on the ocean surface. Ocean color varies from green to blue, depending on the type and concentration of phytoplankton. Climate change will fuel the growth of phytoplankton in some areas, while reducing it in other spots, resulting in changes in the ocean’s appearance.

Living on the ocean surface, Phytoplankton absorb carbon dioxide into the ocean while giving off oxygen. When they die, they bury carbon in the deep ocean, and help to adjust the global climate. But phytoplankton are allergic to the ocean’s warming trend. Warming changes essential characteristics of the ocean and can affect phytoplankton growth.

Stephanie Dutkiewicz, a scientist in MIT’s Center for Global Change Science, built a climate model that projects changes to the oceans throughout the century. In a world that warms up by 3℃, it found that multiple changes to the ocean color would occur. The model projects that currently blue areas with little phytoplankton could become even bluer. But in some waters, a warming will make conditions suitable for phytoplankton, and these areas will turn greener. “Not only are the quantities of phytoplankton in the ocean changing,” she said, “but the type of phytoplankton is changing.”

And why does that matter? Phytoplankton are the base of the food web. “If certain kinds begin to disappear from the ocean,” Dutkiewicz said, “it will change the type of fish that will be able to survive.” Those kinds of changes could affect the food chain.

Whatever color changes the ocean may experience in the coming decades will probably be too gradual and unnoticeable, but they could mean significant changes. “It’ll be a while before we can statistically show that the changes are happening because of climate change,” Dutkiewicz said, “but the change in the color of the ocean will be one of the early warning signals that we really have transformed our planet.”

1.What is the major cause that directly results in changes in the ocean’s color?

A.The temperature of sea water.

B.The type and concentration of phytoplankton.

C.The oxygen given off by phytoplankton.

D.The amount of carbon dioxide in the area.

2.What can be learned from the passage?

A.Phytoplankton have been used to control global climate.

B.Phytoplankton are of little significance in Dutkiewicz’s research.

C.Phytoplankton are not sensitive to the warming trend in the ocean.

D.A warming trend helps phytoplankton grow and oceans may appear greener.

3.What is the main purpose of the passage?

A.To describe the importance of phytoplankton.

B.To explain the effects of climate change on oceans.

C.To introduce a new approach to phytoplankton study.

D.To assess the consequences of changes in ocean color.

高二英语阅读理解中等难度题查看答案及解析

If the work _____ by the end of this month is delayed,the team will be fined.

高二英语单项填空中等难度题查看答案及解析

— When will the new bridge be completed?

— It is said that it _______ by the end of this year.

高二英语单项填空简单题查看答案及解析

By the end of this year, another new hospital _______ in our city.

A.will complete B.will be completed C.is completed D.has been completed

高二英语单项填空简单题查看答案及解析

In the nineteenth century, many stories created by novelists would come to an end with a series of coincidences, most of which were not likely to happen.

In the nineteenth century, a novelist would bring his story to a c1. by presenting his readers with a series of coincidences-most of them wildly improbable.

2. Misfortunes never come singly, which is always true.

What i2. happens is that a great number of things choose to go wrong at precisely the same moment.

3. Qualities such as patience and the ability to recognize the worth of something are absolutely necessary for a bargain hunter of art treasures with devotion.

A truly d3. bargain hunter of art treasures must have patience, and above all, the ability to recognize the worth of something when he sees it

4. It turns out that a man is without question innocent or guilty, which means: “it serves him right”

We might say that justice has been done when a man's innocence or guilt has been proved b4. doubt.

5. Three guests made a sudden visit to your home for dinner invited by your husband, which added to your helplessness and sadness.

As if this were not enough to reduce you to tears, your husband arrives, u5. bringing three guests to dinner.

高二英语单词拼写困难题查看答案及解析

All efforts of cloning an animal will be ________ if there is not enough diversity in the group to overcome illness.

高二英语单项填空中等难度题查看答案及解析

--- Since the end of last century, she has been trying to be a famous singer. Now she has realized her dream.

--- As the saying goes, “_______”

A．Good beginning is half done.

B．Where there is a will, there is a way.

C．Slow but sure wins the race

D．Failure is the mother of success.

高二英语单项填空中等难度题查看答案及解析

If you take __________risk of not wearing a seat belt, you will be at __________risk.

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

高二英语单项填空中等难度题查看答案及解析

Sooner or later, many families will face the situation of moving. The experience can be very bad for kids, who may not be a part of the decision to move and may not understand it. You can take steps to make the entire process (过程) easier for everyone.

Many kids like to stay in familiar places. So as you consider a move, weigh the benefits (好处) of that change against the comfort that neighborhood, school, and social life give your kids. If your family has recently dealt with a big life change, such as death, you may want to put off a move to give your children time to accept the fact.

The decision to move may be out of your hands, perhaps because of a new job or money problems. Even if you’re not happy about the move, try to keep a positive (积极的) attitude to it. During the move, a parent’s attitude can greatly influence kids.

No matter what the results are, the most important way to prepare kids to move is to talk about it. Try to give your children as much information about the move as possible. You can ask kids to join in the planning such as house-hunting or the search for a new school. This can make the change feel less like it’s being forced on them. If you’re moving across town, try to take your children to visit the new house and the new neighborhood.

A move can have many problems, but good things also come from this kind of change. Your family might grow closer and you may learn more about each other by going through it together.

1.According to the text, a move can be a bad experience for kids because ______.

A. they may feel they’re forced to do so　　 B. they often feel lonely in a new school

C. they are ignored by their busy parents　　 D. they are tired of the moving process

2.In which situation does the author advise to put off a move?

A. The child’s birthday is coming.　　 B. A family member has died.

C. The new neighborhood isn’t safe.　　 D. The parents have money problems.

3.Which is the most important when making the move easier for children?

A. Allowing them to choose a school by themselves.　　 B. Trying not to show them the bad parts of a move.

C. Offering them as much information as possible.　　 D. Promising to choose a new house with them.

高二英语阅读理解中等难度题查看答案及解析

The dream of flying into outer space, cherished by the Chinese people for centuries, will soon come true.

　China launched its fourth unmanned spacecraft （飞船）“Shenzhou Ⅳ” on December 30 at the Jiuquan Satellite Launch Centre in Gansu Province. It was the 27th consecutive（连续的 ）and successful launch of China - made rockets since October 1996. This launch has made it more realistic for China to send a person into space on its own following Russia and the USA.

　Qi Faren，leading designer of the spacecraft system, said all the functions （功能） designed for manned flights have withstood （经受住）the test of three previous, successful launches and return landings of the “Shenzhou” spaceships.

　China launched the “Shenzhou Ⅰ ”, “Shenzhou Ⅱ ”and “Shenzhou Ⅲ ”spacecrafts in 1999,2001 and 2002 respectively.

　“Shouzhou Ⅳ” was to make it a more comfortable place in which astronauts can live and work. All parts of the application system for manned flight are aboard the “Shenzhou Ⅳ”craft in all test flights.

　China’s manned flight programme began in 1992. A number of unmanned test flights will be launched before Chinese astronauts are sent into space.

　Leading scientists in charge of China’s manned space programme said the successful launch of the “Shenzhou Ⅳ” laid a solid foundation for the country’s future task of sending Chinese astronauts to outer space.

　The spacecraft returned to the earth on January 5, after completing seven experiments in space.

　Officials at the centre said that“ Shenzhou Ⅴ”, a manned spacecraft, is expected to be launched later this year.

1.How many countries can send a person into space on its own by now？

2..China’s manned flight programme began in ________.

3.As a matter of fact, ________ .

4..Which is the most suitable title for the passage?

高二英语阅读理解中等难度题查看答案及解析