TPO 9 W by 03

happyfaith2008UID: 2709856

TPO 9 W  晚交了，狠拍啊！
In the set of materials we can know that the professor in the lecture agrees with the opinion that the internal-combustion engine can arouse some problems for us, such as the absence of oil, and the world's pollution. However, she opposes the saying that the hydrogen-based fuel-cell engine can solve those prolems.
First of all, hydrogen is not aviliable to power the engine. Since the source needs to stay as a kind of pure liqid, it will have dificulties in producing and storing it.
In addition, using hydrogen to power the engine can not solve the pollution problem. Because it is produced by burning coal and oil which can make the pollution worse.
At last, talking about the economical effect, the professor states that fuel-cell engines are made by a kind of rare and expensive metal. Enve though the new fuel is much cheaper than the traditional fuel, the hydrogen-based feul-cell engine is still not economically competitive.

wuxiahhuUID: 2582392

In the set of materials we can know that the professor in the lecture agrees with the opinion that the internal-combustion engine can arouse some problems for us, such as the absence of oil（？）and the world's pollution. However, she opposes the saying that the hydrogen-based fuel-cell engine can solve these problems.


of all, hydrogen is not available to power the engine, since the resource needs to stay as a kind of pure liquid, which is difficult to produce and store.


In addition, using hydrogen to power the engine can not solve the pollution problem, because it is produced by burning coal and oil, which can make the environment worse.

At last, talking about the economical effect, the professor states that fuel-cell engines are made by a kind of rare and expensive metal. Even though the new fuel is much cheaper than the traditional one, the hydrogen-based fuel-cell engine is still not economically competitive.

点都答到了，但建议使用一些句型，使阅读和听力的对比体现出来，而且还能增加字数（至少200）。
红色的为写错的词，蓝色的是表达上的修改，仅供参考。