- 最后登录
- 2015-3-2
- 在线时间
- 8 小时
- 寄托币
- 301
- 声望
- 0
- 注册时间
- 2007-8-8
- 阅读权限
- 20
- 帖子
- 1
- 精华
- 0
- 积分
- 258
- UID
- 2378390
 
- 声望
- 0
- 寄托币
- 301
- 注册时间
- 2007-8-8
- 精华
- 0
- 帖子
- 1
|
题目:ARGUMENT47 - Scientists studying historical weather patterns have discovered that in the mid-sixth century, Earth suddenly became significantly cooler. Although few historical records survive from that time, some accounts found both in Asia and Europe mention a dimming of the sun and extremely cold temperatures. Either a huge volcanic eruption or a large meteorite colliding with Earth could have created a large dust cloud throughout Earth's atmosphere that would have been capable of blocking enough sunlight to lower global temperatures significantly. A large meteorite collision, however, would probably create a sudden bright flash of light, and no extant historical records of the time mention such a flash. Some surviving Asian historical records of the time, however, mention a loud boom that would be consistent with a volcanic eruption. Therefore, the cooling was probably caused by a volcanic eruption.
字数:405 用时:00:45:00 日期:2007-8-20 上午 11:21:11
According to some historical records of mid-sixth century, the arguer conclude that a volcanic eruption created a large dust cloud throughout Earth's atmosphere that lead to the significant cooler at that time. However, even the arguer himself admit that few records survive from that time, thus the evidence and reasoning in the argument insufficiently lend support to the conclusion, and the arguer should re-examinate the following points.
First of all, the arguer falsely asserts that either a huge volcanic eruption or a large meteorite colliding with Earth is responsible for the falling of the temperature at that time. As a matter of fact, there are other possibilities which will contribute to this decrease as well. It is known that the temperature of the Earth changes regularly, and probably in mid-sixth century is just the time of an ice age, thus makes the temperature much cooler. Without ruling such possibilities, asserting the temperature is caused by the only two reasons is too hasty.
Furthermore, albeit no history record mentioned a sudden bright flash of light which is the direct indication of a meteorite colliding; this possibility cannot be excluded, for we cannot conclude that something did not happen just base on a fact that no one saw it. Since the historical records cited in the argument are primarily from the Asia and Europe, a collision at other part of the earth like Africa, America or even the centre of Pacific Ocean is entirely possible, and therefore no historical record mentioned it. It is also possible that the records which mentioned a meteorite colliding did not managed to survive, so it is impossible for nowadays people to find it.
Finally, there are a quantity of geographical activities that will cause such a boom as well, e.g. an earthquake, even the meteorite colliding. Merely a mention of a loud boom cannot necessarily indicate a volcanic eruption. The best evidence of a volcanic eruption is that someone witnessed it. However, the arguer did not prove that such evidence exists. As a result, this hypothesis is not as convincing and persuasive as it stands.
In sum, the arguer does not find sufficient evidence to support his conclusion. To further justify it, s/he should collect enough evidence which can directly prove that there is no meteorite collision, and witness of the volcanic eruption at that time. Moreover, s/he also have to prove that this weather phenomenon cannot attribute to other reasons.
我承认我的第一个论点逻辑不充分,写完了以后才发现,没时间改了……
还是45分钟,看来再想提高就要搞模板了。 |
|