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求一篇英语作文 写中国航天事业的 内容要包括三个观点 有中心句 观点之间要有恰当的连接句子 要引 关于探索太空的英语作文

求一篇英语作文 写中国航天事业的 内容要包括三个观点 有中心句 观点之间要有恰当的连接句子 要引

In recent years, Chinas space industry has made amazing achievements.
In the history of Chinas space has three very important milestone.The first is the 1970 Chinas successful launch of dongfanghong 1, it is Chinas first man-made earth satellite. This marks China is fully capable of launching its own satellite launch. The second milestone is October 15, 2003, shenzhou v manned spacecraft launch, and successfully carry Chinese astronaut Yang liwei returned to earth, this success marks Chinas ability to launch manned spacecraft, is the third in the world after the United States of the Soviet union has the ability to launch of manned spacecraft countries, after the launch of the shenzhou vi, the shenzhou vii and launch successful, respectively.The third milestone -- a few years ago began to chang e, October 24, 2007 launch, chang e one, it shows that China has initially have the ability to explore deep space.
Finally I wish the cause of Chinas space can have a more brilliant achievements!(不好意思 手打的话可能段落不太分明 ) 如果需要中文翻译的话请告诉我!
希望对你有所帮助!

关于探索太空的英语作文

Man has been fascinated by outer space for thousands of years. It has been
almost over forty years since mans first landing on the moon. Now, some people
believe that space exploration is a sheer waste of time and money. They point
out the fact that it cost billions of dollars to carry on the space research,
but a little information was brought back.
   However, every coin has two
sides. There are still a majority of other people who believe that space
exploration has more advantages. And I agree with those people. Many new
products, such as weather and communication satellites, are also products of
space programs, and they have benefited people all over the world. And whats
more, scientific knowledge about outer space has been acquired by mankind.
We believed that it wi!/bring more benefits in the future, which we can not
even imagine now. Space exploration is a challenge to human beings. Thats why
several nations try hard to carry out space exploration continuously.(英语作文)
  翻译:
   我们是否需要太空探索
人类对外部空间着迷已有上千年的历史了。从人类第一次登上月球起至今已有四十多年了。现在,有些人认为空间探索完全是浪费时间和金钱。他们指出,数百亿美元用于太空研究,但收获甚微。

然而,任何事物都具有两面性。仍有大多数人认为进行空间探索利大于弊,我也非常赞同他们的观点。许多新产品,如气象、通讯卫星都直接得益于空间研究,使全球受益匪浅,而且人类从中获得了不少关于太空的知识。
我们相信,将来它会带给人类更多的好处,有些甚至是我们现在无法想象的。太空探索对我们人类来说是个挑战,这也是为什么许多国家不断进行探索的原因之一。

请为检索课题"航空或航天发动机的设计和制造"编制检索策略。

课题分析:
航空是指一切与天空有关的人类活动,譬如飞行,这些活动亦包括与天空有关的组织,如飞机制造、发展和设计等。人类早就萌发了上天飞行的强烈愿望,这些可从古代的传说中得知,例如中国嫦娥奔月传说。到了19世纪,许多人制造出一些不用发动机的滑翔机来飞行,到了1903年美国人莱特兄弟发明了飞机,并成功试飞,但有部份人认为克雷芒•阿德尔才是真正的飞机发明者。另有与航空相关的大学,专业等。
火箭发动机是喷气发动机的一种,将推进剂箱或运载工具内的反应物料(推进剂)变成高速射流,由于牛顿第三定律而产生推力。火箭发动机可用于航天器推进,也可用于导弹等地面应用。
由以上课题分析制定以下检索策略:
1.自拟关键词,并且构建计算机逻辑表达式如下:
关键词:航空,航天,发动机,设计,制造
基本逻辑检索表达式:
A.中文:(航空or航天)and 发动机 and 设计and制造
B.英文:(aviation
Or space)and engine and design and manufacturing
2.本课题涉及的相关科学领域:天文学,航天工程学,机械设计制造。
3.检索时间范围和文献类型
由于航空航天技术的发展开始于20世纪的前期,1906年德国动力飞艇研究会成立,这是最早的航空航天研究机构,经过了100多年的发展,人类发射了卫星,登上了月球,我们的探测器也登上了火星以及飞出了太阳系,而如今,航空航天技术更是一个国家综合实力的一个体现方式,所以检索时间范围应该是从1906年到现在。
鉴于航空航天发动机技术的时间性和发展性我们考虑,从以下几种文献着手,科技期刊,科技报告以及会议文献。
选择检索方法:针对课题的性质以及内容采用常用法当中的顺查发比较合适,能够满足较高的查全率和差准率。
4.选择检索数据库
中文:万方数据库,维普数据库,中国期刊网
外文:CSA ,EI, IEEE,EBSCO,Proquest,ISI Proseeding
我叫范玉仁

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