首页
登录
职称英语
[originaltext] Before a new airliner goes into service, every part of it is
[originaltext] Before a new airliner goes into service, every part of it is
游客
2024-04-15
56
管理
问题
Before a new airliner goes into service, every part of it is tested again and again. But there are two tests that are more important than all the others. In the first test, a modern airliner must fly at very high altitudes.[23]Air must be pumped into the plane so that the passengers can breathe. The metal structure of the plane has to be very strong for this reason. When the plane is filled with air, the air presses a-gainst the skin of the plane inside. The pressure on a small window, for example, is like a huge foot that is trying to get out. If a small part of the plane were to crack, the plane would explode in the sky. In order to test the structure of the plane, it is lowered into a huge tank of water. Then it is filled with air. The pressure inside the plane is greater than it ever will be when it is in the air. Finally, there is an explosion. Engineers can discover which part of the plane has cracked. In the second test, the test pilot must find out exactly what happens when all the engines are shut off at once. He takes the plane up very high. Then he shuts the engines off. The plane begins to fall like a stone. It is the pilot’s job to find out how he can get control of the plane again. These two tests are examples of how planes are made safe before they can ever carry passengers.
23. Why must air be pumped into the plane?
24. What will possibly cause the plane to crash?
25. For what purpose does the pilot shut off all the engines?
选项
A、The plane can’t fly without air.
B、The plane needs air for its refueling.
C、It meets the passengers’ needs.
D、It meets the pilots’ needs.
答案
C
解析
短文提到,空气必须被灌入飞机里,这样乘客才能呼吸,即为了满足乘客的需要,故选C。
转载请注明原文地址:https://tihaiku.com/zcyy/3556936.html
相关试题推荐
[originaltext]Everyyear,peopleinAmericauseenergyequaltoover30mil
[originaltext]Ifsheernumbersprovideanyproof,America’suniversitiesar
[originaltext]Ifsheernumbersprovideanyproof,America’suniversitiesar
[originaltext]Ifsheernumbersprovideanyproof,America’suniversitiesar
[originaltext]Youprobablyknowwhatamobileis,butthemobileI’mtalkin
[originaltext]W:Iwonderifyoucouldtellmealittlebitaboutyourjobasa
[originaltext]W:Charles,asasinger,doyouevermakeyourselfcrywhenyous
[originaltext]W:Charles,asasinger,doyouevermakeyourselfcrywhenyous
[originaltext]W:I’msofrustratedwiththisnewcomputerprogram.Ijustcan’t
[originaltext]W:I’msofrustratedwiththisnewcomputerprogram.Ijustcan’t
随机试题
Singapore(新加坡)isthenameofanislandonthesouthofMalaya.Itisalsoth
要不是下雨,我们的旅行本来是很愉快的。(butfor)Butfortherain,wewould/couldhavehadapleasant
Duringthenextfewweekspublisherswillreleaseacrushofbooks,pilethe
某坡屋面如图,檐沟宽为500mm,自上而下的做法如下:屋面及檐沟为SBS改性沥
下列哪种疾病做骨髓穿刺时抽出的标本油珠多()A.再生障碍性贫血B.缺铁性贫血C
如下图,正方形ABCD边长为10厘米,一只小蚂蚁E从A点出发均速移动,沿边AB、
妈妈要求小华必须完成作业以后才能看动画片。这种做法符合( )。 A.负强化原则
某房地产开发项目,经过测算得出以下数据:如果市场前景好,净现值为5680万元,如
某市一房地产开发商兴建一栋26层的商住楼,于2012年12月招标后,由某建筑工程
承包人未通知监理人到场检查,私自将工程隐蔽部位覆盖的,监理人有权指示承包人钻孔探
最新回复
(
0
)