首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Boeing Co’s Sonic Cruiser, a proposed faster airliner, would be mostly blended material, program director Walt Gillette said rec
Boeing Co’s Sonic Cruiser, a proposed faster airliner, would be mostly blended material, program director Walt Gillette said rec
admin
2009-03-16
90
问题
Boeing Co’s Sonic Cruiser, a proposed faster airliner, would be mostly blended material, program director Walt Gillette said recently. In its quest for the 【21】______ to fly 15 to 20 per cent faster than 【22】______ airliners, the US company says about 60 per cent of the new plane’s 【23】______, including the wing, would be a carbon-fiber-reinforced composite material that is lighter than aluminum for the same 【24】______. "Composites would 【25】______ almost all of the airplane that you could see from the outside," Gillette said. Composites are well regarded among aeronautical engineers and have been in 【26】______ use since the 1970s. Each generation of planes has more composites, and Gillette 【27】______ that about 10 per cent of Boeing’s 【28】______ civil aircraft, the early-1990s 777, is built 【29】______the material. 【30】______still only a proposal, the Sonic Cruiser has 【31】______ the interest of many airlines, which expressed unusual enthusiasm for the aircraft 【32】______the September 11 attacks forced most of them to scale back operations. When Boeing 【33】______the Sonic Cruiser last year it said the plane might enter service 【34】______2006 and 2008. Gillette said the 【35】______ date now is 2008, by which time the market and technology are expected to have developed 【36】______Wind-tunnel tests 【37】______ the company’s computer calculations of optimal cruising speed for the plane at 95 to 98 per. cent of the speed of sound. Going faster than sound would use too much fuel and 【38】______ great 【39】______ on the aircraft’s engines. Gillette said the Sonic Cruiser 【40】______be offered as a family of aircraft with 200 to 250 seats and a range of 6,500 to 9,000 nautical miles (12,000 to 16,700 kilometers).
选项
A、proficiency
B、efficiency
C、affection
D、effective
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/TLPd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Therecentgrouppollsshow______.Thechildrensurveysaidthat______.
Accordingtothepassage,home-schoolersarethosewho______.Home-schooladvocatesareoftheopinionthat______.
Thisbookisaninvitationtosharetheexperiencesofpeople(31)likeyou,learnanewlanguageorcometoliveinacultured
Thisbookisaninvitationtosharetheexperiencesofpeople(31)likeyou,learnanewlanguageorcometoliveinacultured
Whichofthefollowingbestexplainswhatmakesdiamondagoodengineeringmaterial?CVDisaprocesstoproduce______.
Anallergyisanunusuallystrongreaction(31)asubstance.Manythingscancauseallergies.Themostcommoncauseispollen.T
Tobeginwith,wearewitnessinga(31)explosionof"solos"—peoplewholive(32),outsideafamilyaltogether.Between1970and
ProfessorWangwentonalecturetourtoEdinburgh.
Oneofthemostimportantsocialdevelopments【C1】______helpedtomakepossibleashiftinthinkingabouttheroleofpubliceduc
随机试题
A、药品B、药品质量C、药品标准D、药品标准制定原则E、药品的特殊性药品的物理、化学、生物药剂学、安全性、有效性、均一性等指标符合规定标准程度的是()
异位妊娠自体输血条件错误的是下列哪项
教师的职业道德修养包含______和______。
根据资料.下列表述不正确的一项是:
联合国安全理事会的5个常任理事国是()。
海城市甲公司研发部门技术人员A按公司安排开发一项商业秘密,用于甲公司生产的制鞋柳中,甲公司生产的制鞋机因此在华东地区长期销路很好,市场影响大,知名度很高,有时甚至缺货,海城市乙公司也生产制鞋机,由于技术相对落后,销路不好,乙公司号召员工献计献策,以打开产品
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性:
19世纪末20世纪初垄断组织产生的原因及其在各主要资本主义国家发展变化的动向。比较德国、意大利统一运动的异同。
Mostdoctorsinarecentsurveysaidthatannualphysicalexaminationswereeffectivewith【M1】
PASSAGETWOWhatdoesthelastsentenceinPara.16implyaboutthedaughter’sattitudetowardshermother?
最新回复
(
0
)