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
2010-07-06
65
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).
【39】
选项
A、pressures
B、depression
C、stress
D、anxiety
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/8DDd777K
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
Quantumwillstillbeonairasthelastprogramsofitarestillinthemakingandaretobeshownasscheduled.
Quantumwillstillbeonairasthelastprogramsofitarestillinthemakingandaretobeshownasscheduled.
Quantumwillstillbeonairasthelastprogramsofitarestillinthemakingandaretobeshownasscheduled.Jarvisreveal
Whatwasthewomandoingwhenthepolicemanfoundher?
Asmartmanoncesaidthattheonlythingnecessaryforthetriumphofevilisforgoodmentodonothing.So,asapoliceman,I
Asmartmanoncesaidthattheonlythingnecessaryforthetriumphofevilisforgoodmentodonothing.So,asapoliceman,I
Whatwasthewomandoingwhenthepolicemanfoundher?
AuniversitystudentinNairobi,Kenya,wasstoppedforatrafficviolationtheotherday.Thepolicemantookouthisticketboo
AuniversitystudentinNairobi,Kenya,wasstoppedforatrafficviolationtheotherday.Thepolicemantookouthisticketboo
AuniversitystudentinNairobi,Kenya,wasstoppedforatrafficviolationtheotherday.Thepolicemantookouthisticketboo
随机试题
求解下列矩阵的最小化分派问题。(1)(2)(3)
蜡全部熔解时的温度和开始熔解的温度相比
关于行政许可实施程序的听证规定,下列说法正确的是。(2011年卷二第99题)
由于资源的开发和利用而产生的废物严重威胁人们的健康,21世纪人类的生存环境将面临的挑战不包括( )。
结账前要进行的检查包括()。
金额保证年金(即退还年金)是指当年金受领人死亡时,其年金领取总额低于( )的,保险人以现金形式退还其差额。
三部门组成的经济,消费函数c=80+0.8yd,投资函数i=20一5r,政府购买支出g=20,税收t=0.25y;货币需求函数从L=0.4y一10r,名义货币供应量M=90。其中,r为利率,yd为可支配收入,y为国民收入。若总供给曲线为y=235+40
某网络工程项目的时标网络图如图6-1所示(时间单位:周)。在项目实施过程中,因负责某个子项目实施的网络工程师失误操作发生了质量事故,需整顿返工,造成②~④之间的作业拖后3周,受此影响,工程的总工期将会拖延(28)周。
Tounderstandthemarketingconcept,itisonlynecessarytounderstandthedifferencebetweenmarketingandselling.Nottooma
Ourholidayisdoomedtofailurewithoutyou.
最新回复
(
0
)