TF写作真题第122套（rs047）

题目原文：

Pterosaurs were an ancient group of winged reptiles that lived alongside the dinosaurs. Many pterosaurs were very large, some as large as a giraffe and with a wingspan of over 12 meters. Paleontologists have long wondered whether large pterosaurs were capable of powered flight (flying by flapping their wings) or whether they were able only to glide. Several arguments have been made against powered flight.

Doubters point out that since modern reptiles are cold-blooded, ancient reptiles such as pterosaurs were probably cold-blooded as well. Cold-blooded animals typically have a slow metabolism and are unable to produce a lot of energy. Powered flight is an activity requiring a lot of energy, which is why all modern vertebrates that fly are warm-blooded, not cold-blooded. It seemed unlikely that pterosaurs would have been able to generate the energy needed to fly.

Second, there is a limit to the weight of animals that can be kept airborne by powered flight. Pterosaurs that were as large as a giraffe were probably so heavy that they would not have been able to flap their wings fast enough to stay aloft for any length of time.

Third, all animals with powered flight are able to take off from the ground. For example, birds take off by jumping from their legs or running to gain speed and then jumping. But these methods would not have worked for large pterosaurs. Large pterosaurs would have needed big, powerful muscles in their back legs to launch themselves into the air, and we know from fossilized bones that their back leg muscles were too small and weak to allow the pterosaurs to run fast enough or jump high enough to launch themselves into the air.

题目音频：

写作真题第122套（rs047）

http://mp.weixin.qq.com/s?__biz=MzI3ODM5NzI3Mg==&mid=2247504575&idx=7&sn=ace684a03e26882e792c68e53f2623d0&chksm=eb553a88dc22b39ebab12780d95dea181c4a490ca562344b681c82542464e68fdeaabba9e1c5&scene=21#wechat_redirect

学术写作：

谁来监管社交媒体？

Dr. Gupta

Many believe that social media will remain widely used in the future, since it is both popular and useful in some contexts, but because of the problems it poses, it should be regulated in some way. In your opinion, should governments regulate social media platforms, or should social media companies regulate their platforms themselves? Why do you think so?

Andrew

I believe social media companies should regulate themselves. There are plenty of social media platforms on the market, so the competition is tough.

Claire

Social media companies should be taking an active role in combatting the negative effects, but that is not really happening.

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