The number of tickets _____ will be determine...

The number of tickets _____ will be determined by the size of the stadium.

高二英语单项填空中等难度题查看答案及解析

The warmth of ____sweater will of course be determined by the sort of ____wool used.

A．the, the           B．the, /             C．/, the             D．/,/

高二英语单项填空中等难度题查看答案及解析

. The number 9.11 is a special number, ______, I think, that will be remembered by the Americans for ever.

A. what        B. it        C. which        D. one

高二英语单项填空简单题查看答案及解析

Sea turtles are one of several species that have temperature-dependent sex determination. The number of female babies increases when nests are made in warmer sands.

A recent study by the National Oceanic and Atmospheric Administration, California State University and Worldwide Fund for Nature Australia examined two genetically distinct populations of green sea turtles living in the Great Barrier Reef. The study found that a group of about 200,000 turtles living in the northern part of the reef was almost entirely female.

While the southern population was 65 to 69 percent female, females in the northern group accounted for 99.1 percent of young turtles and 86.8 percent of adults.

After combining their results with temperature data, the scientists in charge of the study found that the northern green turtles have been producing mainly females for more than two decades and that the complete feminization(雌性化) of this population is possible in the near future.

The temperature at which the turtles will produce male or female babies can be passed on to the turtles' children. Most sea turtle populations are now producing offspring above the most suitable temperature, making it clear that climate change causes a serious threat to the survival of these populations.

The chief executive Of World Wildlife Fund Australia, Dermot O'Gorman, said this is another sign of the impact of climate change, following recent research that shows that coral bleaching (珊瑚白化) events are occurring far more frequently than in the past.

“We've had two years where we've had mass bleaching events on the Great Barrier Reef,” he told Guardian Australia. “That's a very visible sign of the impact of climate change. But this is a quiet change. We can't see the impact it's having on a turtle population until a study like this shows some long-term trends.”

The lead author of the paper, Dr Michael Jensen, said the findings represent a major environmental conservation issue.

O'Gorman said more urgent action on climate change is clearly needed, adding that some conservationists have already taken practical measures, such as using shade cloth on turtle nesting beaches to lower the sand temperature, and reducing bycatch(误捕) in the fishing industry.

"Shade cloth can be used in certain places, but there's a limit to the scale you can do that, " he said. "Now every large male who can reproduce is going to be even more important.

1.According to the research on Great Barrier Reef's green sea turtles, __________.

A.about 65 to 69 percent of northern turtles are female

B.86.8 percent of southern turtles have grown up to adults

C.the feminization of green sea turtles could become worse

D.adult green Sea turtles can change their sex in warmer places

2.Why did O'Gorman mention coral bleaching?

A.To suggest that climate change poses more risks to coral than turtles.

B.To compare the living environments of turtles and coral.

C.To urge people to take practical measures to fight climate change.

D.To stress this discovery about green sea turtles is very valuable.

3.Conservationists are taking action to __________.

A.keep the sea turtles' nests cool

B.stop the illegal fishing of green sea turtles

C.expand the size of the green sea turtles' nesting places

D.build special nests for turtles to produce offspring

4.Which would be the best title for the article?

A.How climate change affects ocean creatures

B.Invisible change caused by global warming exposed

C.Necessity of protecting green sea turtles and their habitat

D.Global green sea turtle populations in greater danger

高二英语阅读理解中等难度题查看答案及解析

By the year of 2053 there will be 487 million aged people in China，　　 　 means that one third of the population will be over 60.

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

高二英语单项填空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 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

2008 will be remembered by us Chinese people as a year of sadness and happiness. May of the year sadly saw the Great Sichuan Earthquake, the worst earthquake in China over 30 years. It killed around 70,000 people. Tens of thousands were injured or went missing.

However, to our delight, China also hosted its first Olympic games that summer in Beijing. It was a very successful games with a great opening ceremony. 43 new world records and 132 new Olympic records were made. And China came out first with 51 gold medals.

1.When did the Great Sichuan Earthquake happen?

A．In 2005.          B．In 2006.           C．In 2007.           D．In 2008.

2.About 70,000 people ______ in the earthquake.

A．were killed                            B．were injured

C．went missing                           D．went hungry

3.How many gold medals did China win at the 2008 Beijing Olympic Games?

A．175.             B．132.              C．51.              D．43.

4.We Chinese people were ______ in 2008.

A．sad              B．happy            C．neither sad nor happy D．both sad and happy

高二英语阅读理解中等难度题查看答案及解析

It is believed that the prices of houses will be decreased by ______ 5%.

A. any other            B. the other        C. another      D. other

高二英语单项填空中等难度题查看答案及解析