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考场作文资料:效应
作者: 发布日期:2020-04-12 点击数:217
【名言警句】

要提倡 科学,靠科学才有 希望。——邓小平

2.人借助科学,就能纠正自然界的缺陷。——梅契尼科夫

3.为了照亮地球深处,在黑暗之中看到蕴藏丰富的矿产资源,科学之灯是必须的。——门捷罗夫

4.科学是一把钥匙,既可以打开天堂之门,也可以打开地狱之门,但我们要坚信科学本身的 价值。——理查德?费因曼

5.任何科学上的雏形,都有它双重的形象:胚胎时的丑恶,萌芽时的美丽。——雨果

【运用思路】

科学技术是一把双刃剑,它在给人类带来进步的同时,也带来了麻烦。它演奏着“悲喜交加的交响曲”。人类必须合理地运用它!

【精彩素材1】

寿命变长

古人认为,“人到七十古来稀”,1920年全世界人均预期寿命仅为45岁,而现在联合国人口署把老年人的年龄界限定为“85岁以上”。人类寿命的大幅度延长得益于20世纪医学的迅猛发展和生活水平的显著提高。20世纪还使人类基本解决了吃饭问题。中国科学家袁隆平研究的杂交水稻,使中国用占世界7%的耕地,养活了世界22%的人口。DNA结构的发现,更使人类发现了生命的秘密。有了这本“天书”,人类的生、老、病、死之谜将可望得到破解,并进一步得到控制。

【素材点拨】

科技的迅猛发展为人类社会带来了翻天覆地的变化,促进了人类的发展和生活水平的提高,比如寿命的延长。

【适用话题】

“社会蓝图”、“科技与进步”等。

【精彩素材2】

微生物是一把双刃剑

微生物不仅是众所周知的禽流感、SARS,其实微生物无处不在,而且可使人类受益。尤其是进入21世纪,2003年SARS给人类带来很大的恐慌,最后通过 努力得到控制;进入2004年以后,又开始发生禽流感,到2005年,在中国,禽流感已经开始有人的感染;艾滋病在我国的两个高峰期,首先是在上世纪90年代中期以卖血为主感染的艾滋病,其次是以吸毒为主感染的艾滋病。 流感、禽流感和艾滋病都是由病毒引起的。

微生物是一把双刃剑,它能够给人类带来灾害,但微生物也可以带来好处。也许再过50多年,人类的化石能源会被用尽,必须开发新的能源——生物质能。如果要把秸秆(也就是纤维素)变成生物质能(生物酒精等)需要微生物,微生物发酵将起到很重要的作用。目前国际上都在利用微生物帮助人类产生新的能源。

【素材点拨】

我们必须公正合理的看待周围的事物,认识它的有利的一面和有害的一面,做辩证地分析、判断、利用,以趋利避害。对微生物的认识和利用就是一个典型的例子。

【适用话题】

“两面性”、“辩证看待”、“主动与被动”、“转化”等。

【精彩素材3】

诺贝尔奖的无穷尴尬

——滴滴涕

滴滴涕一度曾是全世界农民的宠儿,甚至二战后在控制疾病方面都显示了神奇的功效,但就是这一所谓人类的宝贵财富、划时代发明的滴滴涕,竟然成了破坏生态之链、毁灭动植物种群、危害人类健康的罪魁祸首。现在,尽管全世界已禁用滴滴涕,但其残毒仍然顽固地滞留在大自然的循环中,即使是远在南极的企鹅也在劫难逃。

【素材点拨】

一切事物都在发展之中,曾经先进的事物也会变为落后的,甚至成为变为有害的,在日新月异的科技领域更是如此。诺贝尔奖的无穷尴尬就充分说明了这一点。

【适用话题】

“进步与落后”、“求变求新”、“发展”等。
    



有才子曰:考场作文资料:效应

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  17. SHOW FULL COLUMNS FROM `qing_user` [ RunTime:0.000469s ]
  18. SELECT * FROM `qing_user` WHERE `iuid` = 87 LIMIT 1 [ RunTime:0.000298s ]
  19. UPDATE `qing_archives` SET `click` = 218 WHERE `id` = 16188 [ RunTime:0.001698s ]
  20. SELECT * FROM `qing_category` WHERE `id` = 103 LIMIT 1 [ RunTime:0.000290s ]
  21. SELECT * FROM `qing_category` WHERE `parent_id` = 95 ORDER BY `listorder` ASC [ RunTime:0.000355s ]
0.130577s