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
60
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
"PhysicalandChemicalPropertiesandChanges"Sugar,water,andaluminumare
Thefollowingdeterminers(限定词)canbeusedwithsingularcountnounsEXCEPT_____.
[originaltext]W:Therestaurantdoesn’tseemtogetenoughcustomers.Ithinkt
建筑室内装饰设计图纸中,详图所用比例一般取()。A.1:1~1:10 B.1
患者,女性,42岁,行肝脏MRI检查,发现肝脏一病灶,病灶在MRI上表现为均匀长
下列属于掌上断面测量分析系统特点的是()。A:电池工作时间长 B:现场数据采
下列说法正确的是A.剂量反应关系是针对群体 B.计量效应关系是针对确定的个体
下列关于关键绩效指标法表述正确的有()。A.对特别关键、影响企业整体价值的
根据回路性质确定电缆芯线最小截面时,下列哪项不符合规定?()A.电压互感器至自
最新回复
(
0
)