【每日阅读训练第四期——速度越障10系列】【10-10】科技

lixiao19910508

5:03
3：14
3:30
3:29
5:05

7:47

fightfor700

谢谢Chrisstine，文章都很不错，排版图片也很漂亮。越障内容很有趣啊，让我想起了唐僧肉。。。

速度：2:56, 2:20, 2:03, 1:59, 3:03
越障：5:27

wensd1111

1 A 02:22
2 A 02:12
3 A 01:41
4 A 01:53
5 A 02:41
6 A 04:23
main idea: the factors affect the human aging
attitude:neutral
structure:1. give us the answer to the question from an unexpected experiments
2. introduce a material which is immortal and which is always used in the experiment.
3.the
last, the conclusion that the factors should be include the stem cell and the ability of the immunity system.

CD用户825193

SPEED

1. [385] 2‘49“Scientists found out that even small radiation is harmful to life. There're places with radiation in the nature background, but studies of small group of people can't prove a lot about the radiation. [NAME] &[NAME] studied 5,000 papers and compared 46 groups of statistics, including negative effects to DNA, plants, sex ratio of offspring.

2. [313] 2'08"
M pointed out that there's no threshold of no negative effect of radiation, and it's been proved by beta range statistics. People assume it's not harmful of small level radiation as they can't see the effect of large groups. We should be careful of the leak of nuclear  power plants, medical equipment, or even the check machine in the airport.

3. [266] 2'15"
GS worked with two other universities and found out that there's a conflict between men and women of the heights. Natural selection works with men and women in different ways. Short women tend to have more children than tall? women, and men do the other way round. Average height parents have the most children and pass the average height genes the most, as they are the majority of population.

4. [288] 2'26"
Sexual conflict of height could benefit to one gender but harm the other one. S studied thousands of families data during 1937-38, and proved that the conflict was visible. Though there's no reason found that why short women tend to have more children, the nature selection still works in reproduction of human. Probably short women put more effort on have children and they started to have the first children at earlier ages, and women who had the first baby at earlier ages tend to be shorter.

5. [417] 3'24"Assistant professor MF and his colleague stimulated models of the greenhouse on earth when temperature changes in the future. It showed that the southwest and north east coast will suffer the most. Though MF also admitted that their research was conservative, because they didn't consider about the floating? of melting ice? Some area will below 400 meters than now as the melting happens, and it'll get warmer in the basins.

OBSTACLE

[697] 6'A recent research held by two universities found out FoxO is the key gene on longevity, according to their research on some small organism. FoxO keep stem genes alive, stem genes keep all organs energetic. They also found FoxO in elderly people over a hundred years, although it had not been verified.
There're two factors keep the humans alive: stem genes and immune system.