恋水无痕
Since 1957 the former Soviet Union launched the world's first artificial Earth satellite, the former Soviet Union and the United States based on the multiple background of the times, carry out competition in the aerospace field, and both astronauts to the moon as a stage victory signs. In subsequent years, the former Soviet Union and Russia in manned spaceflight and the exploration of deep space on the left and many indelible imprint. In order to achieve a lunar landing, the former Soviet Union in the 20th century to the late 1950s to the 1960s, Moon launched a number of unmanned aerial vehicles, for the first time in the world unmanned spacecraft carrying animals from Central flying back to the moon camera to probe the lunar surface soft landing, and developed more than lunar rover. But aerospace experts in the former Soviet Union used to launch lunar spacecraft design a rocket differences: chief designer of the Soviet space Korolev advocated the use of new type of rocket "H1", Qieluomei spacecraft designers and others advocated the "Proton" rocket improvements. The pilot of the two rockets were not successful, a delay of the Soviet lunar landing time. Meanwhile, the United States launched the "Apollo" program, launched by about 300,000 staff, has cost about 25.5 billion US dollars, in 1968, the first manned spacecraft of the moon flight. In 1969, American astronauts on "Apollo 11" spacecraft, the first lunar landing, in which the United States win a race. The setbacks experienced former Soviet Union, began right then used to launch lunar spacecraft "H1" rocket conducted four tests, but all these efforts failed. In 1976 the Soviet Union finally gave up manned lunar flight plan. In the subsequent development of the space shuttle, the former Soviet Union than the United States seven years later, in 1988, launched the "Buran" shuttle 自从1957年原苏联发射了世界上第一颗人造地球卫星,原苏联和美国便基于当时的多重时代背景,在航天领域展开竞赛,并都把宇航员送上月球作为取得阶段性胜利的标志。在以后的岁月中,原苏联和俄罗斯在载人航天、深空探测之路上又留下了诸多不可磨灭的印记。 为了实现登月,原苏联曾在20世纪50年代末至整个60年代向月球发射了多个无人飞行器,在世界上首次实现无人航天器携带动物环月飞行、为月球背面拍照、使探测器在月球表面软着陆,并研制出多辆月球车。但原苏联航天专家在用于发射月球飞船的运载火箭设计上出现分歧:原苏联航天总设计师科罗廖夫主张采用新型火箭“H1”,而航天设计师切洛梅等人主张对“质子”型运载火箭进行改进。对两种火箭的试验均未成功,耽误了原苏联登月的时间。与此同时,美国启动了“阿波罗”计划,发动了约30万工作人员,先后耗资约255亿美元,抢先于1968年实现了载人飞船绕月飞行。1969年,美国宇航员乘坐“阿波罗11”号飞船率先登月,使美国在这一轮竞赛中胜出。 经历这一挫折的原苏联,此后又陆续对用于发射月球飞船的“H1”运载火箭进行了4次试验,但均告失败。1976年原苏联终于放弃了月球载人飞行计划。在随后的航天飞机开发方面,原苏联比美国晚了7年半,于1988年发射了“暴风雪”号航天飞机
国王的咖啡
字母记录英语的方式,注重音,一个英语单词怎么读就该相应的如何写,字形与字音之间有很强联系,所以称为表音文字或拼音文字。汉字记录汉语有一个发展过程,最先只是象形文字,如,为了表达太阳,就画了一个与太阳很象的圆。在中间加上一个点,让人一见就知道其意义,但是怎么读没有规律。然后在象形文字的基础上,又产生了指事字(在象形的基础上再加上点符号表达更多的意义)、会意字(两个或两个以上象形文字彼此组合,让人一见就知道意义如“逐”)就由前面一个人的两只脚印和后面一个人的两只脚印表达后面有人追。)汉字一直发展到形声字,才开始与音有联系,形声字就是汉字的由两个或两个以上部分构成,其中有一个表示音,另一个表示义,如“贡”上面的工字表音,下面的贝字表义,跟财物有关。汉字发展到最后,最成熟的就是形声字,让人对记忆汉字更容易,因为有音,又有意,让人更易掌握。这时候汉字就发展成为音意文字。