首页
登录
职称英语
Gravity is one of those things we take completely for granted. And there are
Gravity is one of those things we take completely for granted. And there are
游客
2023-08-04
52
管理
问题
Gravity is one of those things we take completely for granted. And there are two things about it that we take for granted: the fact that it is always there, and the fact that it never changes. If the Earth’s gravity were ever to change significantly, it would have a huge effect on nearly everything because so many things are designed around the current state of gravity.
Gravity is an attractive force between any two atoms. Let’s say you take two golf balls and place them on a table. There will be an incredibly slight gravitational attraction between the atoms in those two golf balls. If you use two massive pieces of lead and some amazingly precise instruments, you can actually measure an
infinitesimal
attraction between them. It is only when you get a gigantic number of atoms together, that the force of gravitational attraction is significant.
The reason why gravity on Earth never changes is because the mass of the Earth never changes. A change in mass great enough to result in a change in gravity isn’t going to happen anytime soon.
But let’s ignore the physics and imagine that, suddenly there was no force of gravity on planet Earth. This would turn out to be a pretty bad day. We depend on gravity to hold so many things down—cars, people, furniture, pencils and papers on your desk, and so on. Everything would start to float. What’s more, two of the more important things held on the ground by gravity are the atmosphere and the water in the oceans, lakes and rivers. Without gravity, the air in the atmosphere would immediately leap into space. This is the problem the moon has—the moon doesn’t have enough gravity to keep an atmosphere around it, so it’s in a near vacuum. Without an atmosphere, any living thing would die immediately and anything liquid would boil away into space.
In other words, no one would last long if the planet didn’t have gravity.
If gravity were to suddenly double, it would be almost as bad, because everything would be twice as heavy. There would be big problems with anything structural. Houses, bridges, skyscrapers, table legs and so on are all sized for normal gravity. Most structures would collapse fairly quickly if you doubled the load on them.
What this answer shows you is just how integral gravity is to our world. We can’t live without it. It is one of the true constants in our lives. [br] What will be greatly influenced if gravity were to suddenly double?
选项
A、Plants.
B、Animals.
C、Buildings.
D、Water.
答案
C
解析
细节题。根据题干中的be greatly influenced if gravity,were to suddenly double定位到原文第六段。该段第二句中提到,(如果地球引力突然加倍)一切建筑物都会面临着巨大的问题。由此可知,C项表述符合原文,故选C。
转载请注明原文地址:https://tihaiku.com/zcyy/2897224.html
相关试题推荐
[originaltext]M:Hello,Kate.Howareyou?W:Oh,fine,andyou?Howdidthings
[originaltext]M:Hello,Kate.Howareyou?W:Oh,fine,andyou?Howdidthings
[originaltext]W:Charles,amongotherthings,you’reregardedasoneofAmerica
[originaltext]W:Charles,amongotherthings,you’reregardedasoneofAmerica
[originaltext]W:Charles,amongotherthings,you’reregardedasoneofAmerica
Gravityisoneofthosethingswetakecompletelyforgranted.Andthereare
Gravityisoneofthosethingswetakecompletelyforgranted.Andthereare
[originaltext]Aswithsomanyotherthingsinlife,exercisemayworkbest
[originaltext]Aswithsomanyotherthingsinlife,exercisemayworkbest
[originaltext]Aswithsomanyotherthingsinlife,exercisemayworkbest
随机试题
Healwaysdidwellatschool______havingtodopart-timejobseverynowandth
Accordingtothearticle,thevideogameplayercan______.[br]Theauthor’sge
Trendstowardreformhighlighttheinternationalappealofdecentra
在直接标价法下,如果人民币升值,则美元兑人民币()。A、增加或减少无法确定B、不变C、减少D、增加C直接标价法是用1个单位或100个单位的外国货
下列概念中与行为主义学习理论有关的是()。A.强化 B.社会交往
如果用一个圆来表示词语所指称的对象的集合,那么以下哪项中三个词语之间的关系符合下
(2017年真题)某医师治下元虚冷、虚阳上浮之上热下寒证,常选肉桂,此因肉桂除补
肾脏的功能主要是分泌和排泄尿液、废物、毒物和药物,调节和维持体内环境的平衡。变态
旅客运输需求来源于()领域。A:生产和分配 B:分配和交换 C:生产和消费
常用的进度比较方法中,可以形象、直观地反映实际进度与计划进度的比较情况的是()
最新回复
(
0
)