TF写作真题第050套（st002）

ST_002

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综合写作ST 002音频

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综合写作

The toucan-a brightly marked bird of the tropics of the Americas –has long amazed people with its large, colorful bill. A third of the bird’s entire length, the bill is longer than that of any other bird and is strikingly colored. Scientists have debated the question of why the toucan evolved such a bill. At least three theories have been proposed.

First. the toucan’s bill is long and has sawlike edges, making it a potentially formidable weapon against predators. By jabbing with its bill, the toucan could deal a considerable blow to any animal trying to attack it. The sharp edges on the inside portion of its bill could also inflict damage if the toucan tried to fight off an enemy that had attacked it.

Second, the bill’s shape and color could help the toucan hide in its tropical habitat by confusing potential predators. In the dim light of a dense tropical forest, a toucan’s bill could easily be mistaken for a eaf or a piece of fruit. This illusion, in conjunction with the bird’s brightly colored feathers that look like vegetation striped by shade and light, could provide truly effective camouflage protection.

Third, the toucan’s bill could have evolved to help the bird coo itself by providing a large surface area through which excess heat can escape quickly. It is difficult for birds to lose heat through their bodies, since they are covered with insulating feathers. However, a toucan can effectively lose heat by pumping blood into its bill; from there the heat can easily radiate out. In a hot, tropical environment, it is important for birds to regulate their internal temperatures and prevent overheating.

学术写作

Your professor is teaching a class on environmental science.Write a post responding to the professor’squestion.

In your response, you should do the following.

Express and support your opinion.

Make a contribution to the discussion inyour own words.

An effective response will contain at least 100words.

Doctor Diaz

Starting this week,we are going to discuss theeffect that pollution has on our environment.Specifically,we will focus on the pollution ofwaterways,which has caused significant healthproblems around the world. Large amounts ofplastics,industrialwaste,and trash pollute theoceans andrivers.lwant you to consider thefollowing question: How much can individuals helpsolve the water pollution problem compared withlarge institutions suchascorporationsandgovernments? Please explain your position.

Andrew

Individual efforts will likely have little effect. It is better to focuson large corporations that dothe most damage to ourwaterways.Think of the oil companies that have spills andfactory owners that dump chemicals into the waterwaysIndividuals pollute the water too,but companies have muchmore impact.Business leaders need to set examples for thecommunity.

Claire

I think individual people are the first step in solving the pollutionproblem.For example, when one person stops using harmfulchemicals or helps clean up a local waterway,it can inspireothers.They can use social media to spread the word andshare examples of positive behavior. This can quickly becomea grassroots movement for change.

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