首页
登录
职称英语
The great advance【C1】______rocket theory 40 years ago showed that liquid-fue
The great advance【C1】______rocket theory 40 years ago showed that liquid-fue
游客
2023-12-27
73
管理
问题
The great advance【C1】______rocket theory 40 years ago showed that liquid-fuel rockets were far【C2】______in every respect to the skyrocket with its weak solid fuel, the only kind of rocket then known.【C3】______, during the last decade, large solid-fuel rockets with【C4】______fuels about as powerful as liquid fuels have【C5】______their appearance, and it is a favorite layperson’s question to【C6】______which one is "better". The question is meaningless.【C7】______might as well ask whether a gasoline or a diesel engine is "better". It all【C8】______on the purpose. A liquid-fuel rocket is complicated,【C9】______has the advantage that it can be controlled beautifully. The burning of the rocket engine can be stopped completely; it can be reignited when【C10】______.【C11】______, the thrust can be made to vary by adjusting the speed of the fuel pumps. A solid-fuel rocket, on the other hand, is rather【C12】______in construction,【C13】______hard to build when a really【C14】______size is desired. But once you have a solid-fuel rocket, it is ready for action【C15】______very short notice. A liquid-fuel rocket has to be fueled first and cannot be【C16】______readiness for very long after it has been fueled.【C17】______, once a solid-fuel rocket has been ignited, it will keep burning. It cannot be stopped and reignited【C18】______desired(it could conceivably be stopped and reignited after a pre-calculated time of burning has e-lapsed. and its thrust cannot be varied. Because a solid-fuel rocket can be kept ready for a long time, most military missiles【C19】______solid fuels, but human-piloted spaceflight needs the fine adjustments that can【C20】______be provided by liquid fuels. [br] 【C19】
选项
A、expend
B、employ
C、consume
D、utilize
答案
B
解析
作采用:讲,应用employ。utilize是“充分利用”的意思。
转载请注明原文地址:https://tihaiku.com/zcyy/3308732.html
相关试题推荐
Freudiantheoryindeedtookwestern20th-centurycivilizationbystorm.How
Freudiantheoryindeedtookwestern20th-centurycivilizationbystorm.How
Freudiantheoryindeedtookwestern20th-centurycivilizationbystorm.How
Freudiantheoryindeedtookwestern20th-centurycivilizationbystorm.How
Hedrovefastandarrivedaboutanhour______themeetingschedule.A、inadvance
Astechnologicaladvancesputmoreandmoretimebetweenearlyschoollifeandt
Agrowingnumberofpeoplearepursuingadvanceddegreeswithoutstepping______
Adiscussionoftheinterrelationbetweenresearchandtheorysuggestsaprecise
Virtuallyeverytheoryhasbeenconcernedwitheitherthestructureorthefunct
Hewaslookingimpatientatthevisitingsalesman,whoshowednosignsofgettin
随机试题
Whoeversaidthatvictoryhasmanyfathersanddefeatisanorphan,surelyh
运动会已经延迟到下星期一了。ThesportsmeethasbeenputofftillnextMonday.
To__________.[originaltext]AccordingtoAmericanmarketingexpertDr.RonaldM
WhyisAprilthecruelestmonthforAmericanhighschoolseniors?[br]Whichone
A.肺 B.脾 C.肝 D.肾 E.心主一身之气的脏是()
下列不属于农产品期货中经济作物的是()。A、棉花 B、咖啡 C、可可 D
下列做法中不违背护理伦理学不伤害原则的是A.造成本可避免的患者自杀 B.因急于
与其他金融工具相比较,基金是一种( )。A.受益凭证 B.股权凭证 C.信
患者饮冰汽水3瓶,又食生梨后,突发胃脘剧痛,温熨胃脘部,其痛可减,苔白,脉弦紧,
简述侵犯著作权罪的客观行为方式。
最新回复
(
0
)