社会大学i
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
wangyuting3573
ecord 是在分数,文献,档案的记录,例如 世界纪录是 world record, 学校档案记录 school file record, 等 recording由一种形式记录下来的动作表现名词, 例如 recording studio, music recording
hinomoonna
Record英[ˈrekɔːd , rɪˈkɔːd]美[ˈrekərd , rɪˈkɔːrd]n. 记录; 记载; 唱片; (尤指体育运动中最高或最低的)纪录;v. 记录; 记载; 录制; 录(音); 录(像); 演奏音乐供录制; 灌(唱片);[例句]The temperature reached a record low in London last night.昨晚伦敦的气温降到了有记录以来的最低点。[其他] 第三人称单数:records 复数:records 现在分词:recording 过去式:recorded 过去分词:recorded Tally 英[ˈtæli] 美[ˈtæli]v. 计数; 吻合; (说法、数字等)与…符合(或一致); 计算(总的数目、成本等); 合计;n. 记录; 积分表; 账;[例句]Election monitors were turned away while the tallying went on.选票计数过程中,选举监视器也被关闭。[其他] 第三人称单数:tallies 复数:tallies 现在分词:tallying 过去式:tallied 过去分词:tallied
秋林花语
记录英语的文字是字母文字。
英文叫做字母文字,用一个一个的字母拼写出来的。英语的书写使用拉丁字母,又称为“罗马字母”,单词的拼写系统或正确拼写法是依据历史传统而继承下来的,并不严格按照发音规律。因此,英语单词的发音与拼写之间经常有很大差异。
单词拼法也是所有字母语言中最难掌握的拼写之一。拉丁字母、斯拉夫字母和阿拉伯字母被称为世界三大字母体系。
英语的重要性:
学英语是通向世界的窗口,因为英语是世界上最广泛、最重要的语言之一,从全世界来看,说英语的人数将近二十亿,45个国家的官方语言就是英语。英语是国际网络语言,是金融界语言,是空中交通管制语言,是流行音乐的语言,涵盖了人类生活的方方面面。
学好英语就如同打开了一扇世界之窗,我国是经济大国普及英语更是国情需要。
优质英语培训问答知识库