At the meeting they discussed three different to the study of mathematics.A．approaches B．meansC．methods D．ways 题目和参考答案——青夏教育精英家教网—

题目内容

At the meeting they discussed three different __________ to the study of

mathematics.

A．approaches B．means

C．methods D．ways

【解析】A　[approach“方式，路口，通路”是可数名词，后常与介词 to连用。]

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Have you seen a yellow-and-black salamander (火蜥蜴)? How about a scarlet frog? Scientists haven’t spotted either species in more than 20 years. What happened to them? Are the creatures still out there, or are they extinct?

Those are questions that scientists hope to answer. They recently set out around the world in search of those and other long-missing amphibians. An amphibian is an animal that spends part of its life in water and part on land. Frog, toads(蟾蜍), and salamanders are amphibians.

The experts are looking for about 100 species. They are searching at least 14 countries on five continents. They will look for the salamander in North America. They hope to find the scarlet frog in South America. They’re also looking for species in Africa, Asia and Australia.

Scientists are hopeful that they’ll find the amphibians—and soon! If the creatures are out there, they may need help. Many amphibians are endangered. The animals face many dangers including pollution and diseases. People cut down the forests where they live.

“If researchers can find the missing creatures, they might be able to figure out how to save them,” explains expert Robin Moore. He began searching for the amphibians earlier this month.

“This search will tell us a lot about how amphibians are doing,” Moore told WR News. “I don’t know what we will find, but that makes the search even more exciting.”

Lost in the Wild

Scientists’ hunt for missing amphibians is under way. Read about some of the species they hope to find.

Turkestanian salamander

This salamander is a mystery to scientists. Experts found a few of them more than 100 years ago, but none have been seen ever since.

Gastric brooding frog

Experts first discovered this frog in 1914 in eastern Australia. It may be extinct because of disease and habitat loss.

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Last sighting: 1995, in South America

Scientists hope to find this spotted toad in rivers and rainforests in Ecuador. The animal faces threats including pollution and disease.

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C. Turkestanian salamander.

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B. researchers have no way to save amphibians

C. the scientists will search 14 countries at most

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B. Because they want to set up a scientific program.

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The Cave of Lascaux

It was Thursday, September 12,1940.Four French teens were out exploring in the woods off the northern slopes of the Pyrenees.Many years before, an old pine tree fell and left a large hole in the ground.The teenagers were curious and they started to explore the area and fell into one of the most important archeological(考古的) finds of the twentieth century!

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The local education authority (LEA) for the area in which the student is living.

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