题目原文:
The golden frog is a small bright-yellow amphibian that lives in and around mountain streams in Panama The species is severely endangered because of a fungus that infects the frog through its skin and inhibits the frog’s critical life functions, such as breathing. Conservationists have proposed a few solutions to the golden frog’s fungus problem.
Bacterial Protection
First, scientists have identified a natural enemy of the fungus: a type of bacterium. This bacterium produces a chemical that kills fungal cells. Scientists think that they may be able to introduce colonies of this bacterium to the skin of golden frogs. The bacterial colonies would then protect the frogs against the fungus infection
Breeding Frogs in Captivity
Second, researchers are considering the possibility of breeding golden frogs in captivity and then releasing them in the wild to replenish wild populations The golden frog can develop disease-free in captivity; where it is isolated from the fungus When golden frogs bred in captivity are released in habitats where wild golden frogs have died out, the frogs bred in captivity will give rise to a healthy, fungus-free population.
A Natural Defense
Third, it is possible that golden frogs w川 overcome the threat posed by the fungus without human intervention. Some golden frogs have what seems to be a natural defense against the fungus. When infected, they increase their body temperature, which slows down the growth of the fungus If this ability to resist the fungal infection spreads among the golden frog population as a whole, the frog population is likely to overcome the crisis and start increasing again.
题目音频:
写作真题第136套(rs061)
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学术写作:
长假是否需要布置作业?
Dr. Achebe
Some parents and educators believe that students tend to forget the material they have learned when they are away from school for extended periods of time, such as summer or winter breaks. To address this, many schools have started giving students assignments to complete during these long breaks. In your opinion, should students be given assignments during long breaks to help them retain what they’ve learned?
Student A: Claire
I believe students should get assignments during long breaks.
Student B: Andrew
I’m not sure I agree with Claire. Giving students assignments during breaks might not be effective because students often struggle to work efficiently on their own.
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