送“神五”升空的长二F型火箭
<p>2003年10月15日上午9时整，托举着“神舟”五号载人飞船的“长征”二号<span word="F">F</span>型运载火箭在轰鸣声中直冲蓝天，把一条巨龙般的橘红色烈焰留在秋日的戈壁长空。</p><p><span word="At">At</span> 9:00 <span word="a">a</span>.<span word="m">m</span>. <span word="on">on</span> <span word="October">October</span> 15, 2003, <span word="the">the</span> <span word="long">long</span> <span word="march">march</span>-2<span word="f">f</span> <span word="carrier">carrier</span> <span word="rocket">rocket</span> <span word="carrying">carrying</span> <span word="the">the</span> <span word="Shenzhou">Shenzhou</span>-5 <span word="manned">manned</span> <span word="spacecraft">spacecraft</span> <span word="rushed">rushed</span> <span word="into">into</span> <span word="the">the</span> <span word="blue">blue</span> <span word="sky">sky</span> <span word="in">in</span> <span word="the">the</span> <span word="roar">roar</span>, <span word="leaving">leaving</span> <span word="a">a</span> <span word="dragon">dragon</span> <span word="like">like</span> <span word="orange">orange</span> <span word="flame">flame</span> <span word="in">in</span> <span word="the">the</span> <span word="autumn">autumn</span> <span word="Gobi">Gobi</span> <span word="sky">sky</span>.</p><p>乳白色的“长征”二号<span word="F">F</span>型火箭起飞重量479。8吨。它是在“长征”二号<span word="E">E</span>型火箭基础上研制的以发射飞船为主要任务的运载火箭，1992年开始研制，1999年首发成功。此前，这种火箭已经成功地将4艘无人飞船送入太空。</p><p><span word="The">The</span> <span word="Milky">Milky</span> <span word="Long">Long</span> <span word="March">March</span> <span word="II">II</span> <span word="f">f</span> <span word="rocket">rocket</span> <span word="has">has</span> <span word="a">a</span> <span word="takeoff">takeoff</span> <span word="weight">weight</span> <span word="of">of</span> 479. 8 <span word="tons">tons</span>. <span word="It">It</span> <span word="is">is</span> <span word="a">a</span> <span word="launch">launch</span> <span word="vehicle">vehicle</span> <span word="developed">developed</span> <span word="on">on</span> <span word="the">the</span> <span word="basis">basis</span> <span word="of">of</span> <span word="the">the</span> <span word="Long">Long</span> <span word="March">March</span> <span word="II">II</span> <span word="E">E</span>-<span word="type">type</span> <span word="rocket">rocket</span>, <span word="which">which</span> <span word="takes">takes</span> <span word="launching">launching</span> <span word="spacecraft">spacecraft</span> <span word="as">as</span> <span word="the">the</span> <span word="main">main</span> <span word="task">task</span>. <span word="It">It</span> <span word="was">was</span> <span word="developed">developed</span> <span word="in">in</span> 1992 <span word="and">and</span> <span word="launched">launched</span> <span word="successfully">successfully</span> <span word="in">in</span> 1999. <span word="Previously">Previously</span>, <span word="the">the</span> <span word="rocket">rocket</span> <span word="has">has</span> <span word="successfully">successfully</span> <span word="launched">launched</span> <span word="four">four</span> <span word="unmanned">unmanned</span> <span word="spacecraft">spacecraft</span> <span word="into">into</span> <span word="space">space</span>.</p><p>作为中国火箭家族中最重、最长的成员，“长征”二号<span word="F">F</span>型火箭采用了55项新技术，使它同时成为中国航天史上技术最复杂、可靠性安全性指标最高的火箭。</p><p><span word="As">As</span> <span word="the">the</span> <span word="heaviest">heaviest</span> <span word="and">and</span> <span word="longest">longest</span> <span word="member">member</span> <span word="of">of</span> <span word="China">China</span>'<span word="s">s</span> <span word="rocket">rocket</span> <span word="family">family</span>, <span word="the">the</span> <span word="long">long</span> <span word="march">march</span> 2<span word="F">F</span> <span word="rocket">rocket</span> <span word="has">has</span> <span word="adopted">adopted</span> 55 <span word="new">new</span> <span word="technologies">technologies</span>, <span word="making">making</span> <span word="it">it</span> <span word="the">the</span> <span word="most">most</span> <span word="complex">complex</span> <span word="rocket">rocket</span> <span word="with">with</span> <span word="the">the</span> <span word="highest">highest</span> <span word="reliability">reliability</span> <span word="and">and</span> <span word="safety">safety</span> <span word="index">index</span> <span word="in">in</span> <span word="China">China</span>'<span word="s">s</span> <span word="aerospace">aerospace</span> <span word="history">history</span>.</p>
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