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
50
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).
【26】
选项
A、contagious
B、infectious
C、publicizing
D、widespread
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/qDDd777K
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
Theaveragepersonseestensofthousandsofimagesaday—imagesontelevision,innewspapersandmagazines,andonthesidesof
Quantumwillstillbeonairasthelastprogramsofitarestillinthemakingandaretobeshownasscheduled.ABCwilltry
Quantumwillstillbeonairasthelastprogramsofitarestillinthemakingandaretobeshownasscheduled.ABCwillrese
Quantumwillstillbeonairasthelastprogramsofitarestillinthemakingandaretobeshownasscheduled.Quantumislo
Whoisthepersonbeinginterviewed?
Whatwasthewomandoingwhenthepolicemanfoundher?
AuniversitystudentinNairobi,Kenya,wasstoppedforatrafficviolationtheotherday.Thepolicemantookouthisticketboo
AuniversitystudentinNairobi,Kenya,wasstoppedforatrafficviolationtheotherday.Thepolicemantookouthisticketboo
随机试题
行车中遇缺乏交通经验的行人时,应提高警惕,控制好车速,做好随时停车或让行的准备。
下列情况多见导致缺血缺氧性颅内出血的是
口腔修复应用材料的性能中错误的描述是良好的
A.暂停执业活动三个月至六个月B.暂停执业活动六个月至一年C.给予行政处分D.吊销医师执业证书E.追究刑事责任不按规定使用麻醉药品、精神药物,情节严重的,由卫生行政部门给予的处理是
甲股份有限公司(以下简称甲公司)为增值税一般纳税人,适用的增值税税率为17%。为建造一幢厂房,于2012年12月1日从某银行借人专门借款1000万元(假定甲公司向该银行的借款仅此一笔),借款期限为2年,年利率为6%,到期一次支付本金和利息。该厂房采用出包方
甲公司向银行借款900万元,年利率为8%,期限1年,到期还本付息,银行要求按借款金额的15%保持补偿性余额(银行按2%付息)。该借款的有效年利率为()。
在人类突破自身极限的过程中,技术进步________。世界体育成绩的总体表现呈上升趋势,这在很大程度上取决于人们对健身、调节、饮食与营养的理解和重视,同样还需要感谢装备和训练等技术条件的进步对人类发掘自身潜力的促进。但仍有一种________的趋势值得警惕
[2009年]袋中有一个红球、两个黑球、三个白球.现在有放回地从袋中取两次,每次取一个,以X,Y,Z分别表示两次取球所取得的红球、黑球与白球个数.求二维随机变量(X,Y)的概率分布.
系统运行过程中,处理机的状态处于目态或管态变化中,从目态到管态的途径是【】。
Bytheyear2100,globaltemperaturesareanticipatedtorisebybetween0.8and3.5degreeCelsius.Thatmaynotseemlikemuch
最新回复
(
0
)