If nothing ______, the oceans will turn into ...

If nothing________，the oceans will turn into fish deserts.                (2013·湖南，26)

A．does　                             B．had been done

C．will do　                             D．is done

高三英语单项填空中等难度题查看答案及解析

(2013·湖南，26)If nothing________，the oceans will turn into fish deserts.

A．does　     B．had been done

C．will do　     D．is done

高三英语单项填空简单题查看答案及解析

(2013·湖南，26)If nothing________，the oceans will turn into fish deserts.

A．does　 B．had been done

C．will do　 D．is done

高三英语单项填空中等难度题查看答案及解析

If nothing ________， the oceans will turn into fish deserts.

A. does　　 　　　　　　　　 B. had been done

C. will do　　 　　　　　 D. is done

高三英语单项填空中等难度题查看答案及解析

(2013·高考湖南卷)If nothing________，the oceans will turn into fish deserts.

A．does　     B．had been done

C．will do　     D．is done

高三英语单项填空中等难度题查看答案及解析

If nothing ______, the oceans will turn into fish deserts.

A.is done B.has done C.will be done D.does

高三英语单项填空中等难度题查看答案及解析

If nothing ________, the oceans will turn into fish deserts.

A．does             B．had been done     C．will do            D．is done

高三英语单项填空中等难度题查看答案及解析

Everything will be done_____，if nothing unexpected turns up.

A.  like it planned                    B. as it planned     C. like planned     D. as planned

高三英语单项填空中等难度题查看答案及解析

PERTH—Search crews will send a submarine(潜航器)deep into the Indian Ocean on Monday for the first time to try to determine whether signals detected by sound-locating equipment are from the　 missing Malaysian plane's black boxes, the Australian head of the search said.

Angus Houst on said the crew on board the Ocean Shield　 will send the underwater vehicle sometime Monday evening. The Bluefin 21 submarine can create a sonar(声呐)map of the area to chartany wreckage(残骸)on the seafloor.

The move comes after crews picked up a series of underwater sounds over the past two weeks that were consistent with an aircraft's black boxes.

“We haven’t had a single detection in six days, and l guess it’s time to go under water,” said Houston.

“Analysis of the four signals has reduced the search area on the ocean floor. The experts have therefore determined that the Australian Defense Vessel Ocean Shield will stop searching with the Towed Pinger Locator(拖曳声波定位仪)later today and use the underwater vehicle Bluefin 21 as soon as possible," he said at a news conference in Perth.

But Houston warned the switch to the submarine will not automatically "result in the detection of the aircraft wreckage. It may not.”

He said the submarine will take 24 hours to do each task, including two hours to dive, 16 hours to search the bottom, then two more hours hack up and four hours to download data.

Recovering the plane's flight data and cockpit(飞行员座舱)voice recorders is necessary For investigators to try to figure out what happened to Flight 370, which disappeared on March 8.　

Houston said the search using the submarine will be a slaw and painstaking process.

The submarine takes six times longer to cover the same area as the pinger locator,and will need about six weeks to two months to examine the present underwater zone. The signals are also coming from 4,500 meters (15,000 feet) below the surface, which is the deepest the submarine can dive.

1.The submarine will be sent deep into the Indian Ocean on Monday to _____ .

A. create a sonar trap of the area

B. pick up underwater sounds

C. see if the signals detected are from the target black boxes

D. reduce the search area on the ocean floor

2.According to the passage, the submarine_______ .

A. will download data of the black boxes

B. can find the aircraft wreckage within 24 hours

C. will recover the plane's flight data and voice recorder

D. can dive to a depth of no more than 4,500 meters

3.The underlined sentences in the passage indicate that______.

A. the switch of the submarine may not function properly

B. the Ocean Shield will switch to submarine when it is necessary

C. the submarine will detect the wreckage of the plane automatically

D. the detection of the wreckage can't be guaranteed by using the submarine

4.The search will be a slow and painstaking process, mainly because _____ .

A. the underwater sounds were consistent with an aircraft's black boxes

B. the submarine travels slowly and the ocean is deep

C. they haven't had a single detection in six days

D. Ocean Shield stops searching wine the towed pinger locator

高三英语阅读理解困难题查看答案及解析

By the end of the century，if not sooner，the world’s 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. Because of the way light reflects off the organisms，these phytoplankton create colourful patterns at the ocean surface. Ocean colour 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，leading to changes in the ocean's appearance.

Phytoplankton live at the ocean surface，where they pull carbon dioxide(二氧化碳) into the ocean while giving off oxygen. When these organisms die，they bury carbon in the deep ocean，an important process that helps to regulate the global climate. But phytoplankton are vulnerable to the ocean's warming trend. Warming changes key characteristics of the ocean and can affect phytoplankton growth，since they need not only sunlight and carbon dioxide to grow，but also nutrients.

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 colour of the oceans would occur. The model projects that currently blue areas with little phytoplankton could become even bluer. But in some waters，such as those of the Arctic，a warming will make conditions riper 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. ”

1.What are the first two paragraphs mainly about?

A. The various patterns at the ocean surface.

B. The cause of the changes in ocean colour.

C. The way light reflects off marine organisms.

D. The efforts to fuel the growth of phytoplankton.

2.What does the underlined word “vulnerable” in Paragraph 3 probably mean?

A. Sensitive. B. Beneficial

C. Significant D. Unnoticeable

3.What can we learn from the passage?

A. Phytoplankton play a declining role in the marine ecosystem.

B. Dutkiewicz's model aims to project phytoplankton changes

C. Phytoplankton have been used to control global climate

D. Oceans with more phytoplankton may appear greener.

4.What is the main purpose of the passage？

A. To assess the consequences of ocean colour changes

B. To analyse the composition of the ocean food chain

C. To explain the effects of climate change on oceans

D. To introduce a new method to study phytoplankton

高三英语阅读理解中等难度题查看答案及解析