神奇的火焰山 神奇的火焰山 人类何时飞出太阳系阅读答案 急jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj

神奇的火焰山 神奇的火焰山 人类何时飞出太阳系阅读答案 急jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
神奇的火焰山
神奇的火焰山 人类何时飞出太阳系阅读答案
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神奇的火焰山 神奇的火焰山 人类何时飞出太阳系阅读答案 急jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj
火焰山位于吐鲁番盆地的北缘.古书称之为“赤石山”,维吾尔语称“克孜勒塔格”〔意为红山〕,由红色砂岩构成,东起鄯善县兰干流沙河,西至吐鲁番桃儿沟,形成一条赤色巨龙,东西走向,横卧于吐鲁番盆地中,全长98公里,南北宽9公里.一般高度500米左右,最高峰在鄯善县吐峪沟附近,海拔831.7米.
火焰山是天山东部博格达山坡前山带短小的褶皱,形成于喜马拉雅山运动期间.山脉的雏形形成于距今1.4亿年前,基本地貌格局形成于距今1.41亿年前,经历了漫长的地质岁月,跨越了侏罗纪、白垩纪和第三纪几个地质年代.火焰山荒山秃岭,寸草不生.每当盛夏,七月流火,红日当头,地气蒸腾,焰云缭绕,赭红色的山体形如飞腾的火龙,十分壮观.火焰山是全国最热的地方,夏季最高气温达47.8度,地表最高温度在70度以上.由于地壳运动断裂与河水切割,山腹中尚留下许多沟谷,主要有葡萄沟、桃儿沟、木头沟、吐峪沟、连木沁沟、苏伯沟等.在这些沟谷中,绿荫蔽日,风景秀丽,流水潺潺,瓜果飘香.
明人吴承恩著名神话小说《西游记》,以唐僧师徒四人西天取经的故事而脍炙人口,名闻天下.第五十九回和六十回写“唐三藏路阻火焰山,孙行者三调芭蕉扇”的故事,使火焰山披上一层神秘的色彩,成了一座奇山.
《西游记》写道：“西方路上有个斯哈哩国,乃日落之处,俗呼‘天尽头’.这里有座火焰山,无春无秋,四季皆热,那火焰山有八百里火焰,四周寸草不生.若过得山,就是铜脑袋、铁身躯,也要化成汁哩!”这段文字显系夸张,但高温和寸草不生这些基本特征,与火焰山实际情况完全符合,不是凭空臆造的.
人类何时飞出太阳系
①人类的航天时代,如果从1975年苏联发射第一颗人造卫星算起,已有40多年的历史.这期间,人类挣脱了地球的引力,飞出了地球村,登上了月球.可人类总嫌飞天的步伐太慢,总以焦急的心情盼望着——何时才能飞出太阳系,进入宇航时代?20世纪70年代人类放飞的太空天使“先驱者”和“旅行者”探测器,到目前已飞出了二三十年,跋涉60亿千米,已飞越了最远的冥王星轨道,但它是否已飞出了太阳系呢?
②其实,太阳系的边界十分广阔,如果以太阳风影响所及的范围来计算,半径可达成135亿千米～180亿千米；如果以太阳的引力所及的范围来计算,半径可达成15万亿千米,约1.5光年.由此可见,上述的飞行探测器离太阳系的边界还差得很远很远.从宇宙的尺度来说,太阳系只是沧海一粟,跨越一条小河沟容易,要跨越大洋,就必须具备足够的条件.就目前人类对宇宙的了解认识和所具有的航天技术,对宇航来讲是远远不够的,还远远不能适应飞出太阳系的要求.
③所以“先驱者”与“旅行者”探测器只能算是冲出地球大气层的“航天”,还远远谈不上冲出太阳系的“宇航”.
④对于飞出太阳系的宇宙航行来说,眼下还只是一张白纸,任凭人们去设计、去幻想.目前人们的设想之一是必须开发质量小、作用时间长和高能的空间动力能源.如电能火箭、激光火箭、核能火箭以及微波动力飞船、激光动力飞船、反物质推进星际飞船等等.必须大大提高宇宙飞船速度,以每秒几百千米、几千千米、几万千米甚至以接近光速的速度飞行,这样,人们在数十年的有生之年,才有可能飞出太阳系,去别的恒星系、银河系或更遥远的河外星系进行星际航行.
⑤何时能飞出太阳系,取决于我们地球人类的智慧和科学技术的发展水平.努力吧,也许在几十年、上百年后,人类向往星际航行的梦想就会成为现实.
1、请回答第1段最后一句所提出的问题,并引用文中语句作为依据.
2、根据人们目前的设想,人类要能飞出太阳系必须解决哪两个问题?
3、第4段中画线句子有什么表达作用?
4、最后一段中加点的词语“也许”能否删去?为什么?
1、请回答第1段最后一句所提出的问题,并引用文中语句作为依据.
答：“先驱者”和“旅行者”探测器仅跋涉60亿千米,而以太阳风影响所及的范围来计算,太阳系半径可达成135亿千米～180亿千米.以太阳的引力所及的范围来计算,半径可达成15万亿千米,约1.5光年.因此还远远不能飞出太阳系.
2、根据人们目前的设想,人类要能飞出太阳系必须解决哪两个问题?
答：1、必须开发质量小、作用时间长和高能的空间动力能源.
2、必须大大提高宇宙飞船速度.
3、第4段中画线句子有什么表达作用?
（不知道是哪一句）
4、最后一段中加点的词语“也许”能否删去?为什么?
答：不能.“也许”只是一种推断,并不一定是真实的.如果去掉“也许”语气变为肯定,与原意不符.体现了说明文语言的准确性.
还有一种：
1.本文的说明顺序?从文中摘录这一顺序的词语
2.第二段的“沧海一粟”有什么表达效果?
3.简要概括“先驱者”与“旅行者”没有飞出太阳系的原因
4.人类要实现这个梦想,必须解决的两大主要问题?你是用什么方法得出这个答案的?
1.按时间顺序来说明的
从1957年...
划分为两个阶段...
40多年来,...飞出太阳系的时间表,..