每日一词∣载人航天工程“三步走”发展战略 three
<p>5月5日晚，长征五号<span word="B">B</span>运载火箭在海南文昌航天发射场首飞成功。中国载人航天工程办公室表示，此次发射成功验证了新型火箭的总体设计和技术，正式拉开我国载人航天工程“第三步”任务的序幕。该阶段的目标是将载人空间站送入轨道。</p><p><span word="China">China</span>'<span word="s">s</span> <span word="Long">Long</span> <span word="March">March</span> 5<span word="B">B</span> <span word="carrier">carrier</span> <span word="rocket">rocket</span> <span word="made">made</span> <span word="its">its</span> <span word="first">first</span> <span word="flight">flight</span> <span word="on">on</span> <span word="Tuesday">Tuesday</span> <span word="evening">evening</span> <span word="at">at</span> <span word="the">the</span> <span word="Wenchang">Wenchang</span> <span word="Space">Space</span> <span word="Launch">Launch</span> <span word="Center">Center</span> <span word="in">in</span> <span word="Hainan">Hainan</span> <span word="province">province</span>. <span word="The">The</span> <span word="China">China</span> <span word="Manned">Manned</span> <span word="Space">Space</span> <span word="Agency">Agency</span> <span word="said">said</span> <span word="the">the</span> <span word="flight">flight</span> <span word="successfully">successfully</span> <span word="verified">verified</span> <span word="the">the</span> <span word="overall">overall</span> <span word="design">design</span> <span word="and">and</span> <span word="technologies">technologies</span> <span word="of">of</span> <span word="the">the</span> <span word="new">new</span> <span word="rocket">rocket</span> <span word="and">and</span> <span word="also">also</span> <span word="marked">marked</span> <span word="the">the</span> <span word="beginning">beginning</span> <span word="of">of</span> <span word="the">the</span> <span word="third">third</span> <span word="stage">stage</span> <span word="in">in</span> <span word="China">China</span>'<span word="s">s</span> <span word="manned">manned</span> <span word="space">space</span> <span word="program">program</span>, <span word="which">which</span> <span word="aims">aims</span> <span word="to">to</span> <span word="put">put</span> <span word="a">a</span> <span word="manned">manned</span> <span word="space">space</span> <span word="station">station</span> <span word="into">into</span> <span word="orbit">orbit</span>.</p><p>2020年5月5日，长征五号<span word="B">B</span>运载火箭在海南文昌首飞成功，正式拉开我国载人航天工程“第三步”任务的序幕。1992年9月，中国实施载人航天工程并确定中国载人航天“三步走”的发展战略：第一步，发射载人飞船，建成初步配套的试验性载人飞船工程，开展空间应用实验。第二步，突破航天员出舱活动技术、空间飞行器的交会对接技术，发射空间实验室，解决有一定规模的、短期有人照料的空间应用问题。第三步，建造空间站，解决有较大规模的、长期有人照料的空间应用问题。</p><p>长征五号<span word="B">B</span>运载火箭以长征五号运载火箭为基础改进研制而成，主要承担着我国空间站舱段等重大航天发射任务，是目前我国近地轨道运载能力最大的火箭。长征五号<span word="B">B</span>首次飞行任务取得圆满成功，拉开了我国空间站在轨建造阶段飞行任务的序幕，为后续空间站核心舱、实验舱发射奠定了坚实基础。</p>
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