首页
登录
职称英语
[originaltext] Spacemen have to be specially trained for traveling in space.
[originaltext] Spacemen have to be specially trained for traveling in space.
游客
2024-03-01
6
管理
问题
Spacemen have to be specially trained for traveling in space. They should be in very good mental and physical health. Most of them are experienced pilots of very fast aeroplanes.
All spacemen have to do various space exercises before traveling to space. They have to be strong enough to bear the great pressures they will feel at launching and landing. When traveling in space or orbiting round a planet, spacemen have to become used to the weightless conditions and learn how to walk, eat, drink and sleep in a condition of weightlessness. They train for their space travels in model spacecraft, which are like the actual spacecraft. Spacemen also have to know all about the various parts of their spacecraft. They should be able to repair any part that is damaged while traveling.
When man goes into space he must take air, food and water. He must also get rid of bad air and waste matter. Food is prepared in a paste form and kept in tubes. Waste is stored in containers and got rid of when the spacecraft reaches the Earth. These problems have been solved for short space trips, but not for long trips.
选项
A、They need more friends who give them courage.
B、They need more physical exercises.
C、They need more food.
D、They need special training.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3496735.html
相关试题推荐
[originaltext]M:Isthistableinthecomerokay?W:Sure.Wecansithere.M:
[originaltext]M:Isthistableinthecomerokay?W:Sure.Wecansithere.M:
[originaltext]M:Isthistableinthecomerokay?W:Sure.Wecansithere.M:
[originaltext]M:Isthistableinthecomerokay?W:Sure.Wecansithere.M:
[originaltext]W:Ihavebeenlookingthroughyourapplication.Youseemtohave
[originaltext]W:Ihavebeenlookingthroughyourapplication.Youseemtohave
[originaltext]M:I’dliketocheckin,please.Ididn’tmakeareservation.W:
[originaltext]AmericanengineersPaulFloresandJimGibbsonarestudyingM
[originaltext]AmericanengineersPaulFloresandJimGibbsonarestudyingM
[originaltext]SomepeopledividetheEnglishlearnersintothreegroups:be
随机试题
Oneofthemostfamousandmosttalked-aboutactressestocomeoutofHollyw
[originaltext]Americansuseavarietyofstrategiestoavoidsilence.Theykeep
HowtoWriteaSpeechWecancategorizethewhol
Thefireextinguisherusesachemical______ratherthanwater.A、foamB、foilC、f
当感觉与对向驶来的车辆会有会车困难的时候,应及时减速靠边行驶,或停车让行。()
在钢筋混凝土肋梁楼盖施工中,若沿主梁方向浇混凝土,则施工缝应留在()。A.主
当分包工程发生质量、安全、进度等方面问题给建设单位造成损失时,建设单位只可以根据
肺内直径小于2cm病灶的最佳检查方法是A.高分辨CT B.透视 C.X线平片
易发生休克的骨折:A.骨盆骨折 B.肱骨髁上骨折 C.股骨颈骨折
切除子宫做病理检查,光镜下见子宫壁深肌层内有大量异型的滋养层细胞浸润,并有绒毛结
最新回复
(
0
)