求帮改综合作文

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老栽综合写作上，一直都是fair，想请大家帮看看，哪些方面还需要提高，哪些地方没有把握住，感激~


TPO14  （讲remove dead tree好处，听力反驳说不好）

The professor explained three negative aspects of salvage logging, each of which contradicted the benefits mentioned in the passage including provide space for new trees, prevent insects gathering and gain extra financial income while provide more jobs.
First, the lecturer explained that removing dead woods may provide enough space, but on the other hand, it also make the new trees lack of nutirents. The ground could absorb the nutrients from decomposition of the dead tree, and provide it for new trees to promote growing. This is the first point that lecture contradicts the passage.
Second, the professor explained that the insect may not be harmful, but helpful for the trees. The spruce bark beetle, which was mentioned in the passage as a insect japerdizing trees, actually doesn't damage woods at all. Furthermore, the dead tree could attract insects and birds which can contribute to the forest. This is the second part where professor dispute the article.
Finally, the ecomonic benifits are limited and job opportunities couldn't last long. While the dead trees could provide small amouts of profits, high cost equipment such as helicopters shoule put into use for transportation. And native people are rarely get the job positions which require adept skills. This is the third point that reality contradicts theory.


TPO15（讲捕捉cane toad的方法，听力反驳说几个办法都不行）

The professor explained three reasons to contradict the theoretical methods, including build the obstacles, gather citizens for actions and invent virus to poison the toads, mentioned in the passage to prevent the spread of the cane toad in Australia.
First, the lecturer explained that the fence could not prevent the spread of the toad eggs which was found in rivers and could spread by the flow to areas all over the country. Furthermore, the method can also leads to negative result that the enviroment is likely to be harmed. It's the first point that professor disputes the passage.
Second, the professor also explained the difficulty of differentiating the cane toad and other rare frog species in Australia. Although the volunteers can catch and destroy a part of the cane toad, they can also kill a great amount of frog species, which are more difficult to recognize when they're not mature. This is the second part where reality contradicts theory.
Finally, concerns are raised in the listening that the virus could damage the eco-system in another conticent. Even if the virus successfully control the population of the cane toad in Australia, itself might be out of control when it was spread by the cane toads to North America, where cane toad is an important part of the natrual system. It is the third part that professor disputes the reading passage.