首页
登录
职称英语
[originaltext] In a way, all of us are on a spaceship, the planet Earth. We
[originaltext] In a way, all of us are on a spaceship, the planet Earth. We
游客
2024-03-02
63
管理
问题
In a way, all of us are on a spaceship, the planet Earth. We move around the sun at 18 miles per second and never stop. On our spaceship we have five billion people and a limited supply of air, water, and land. These supplies have to be used carefully because we can’t buy new air, water, or land from anywhere else.
The environment on our planet is a closed system Nothing new is ever added. Nature recycles its resources. Water, for example, evaporates and rises as visible drops to form clouds. This same water returns to the earth as rain or snow. The rain that falls today is actually the same water that fell on the land 70 million years ago.
Today, the Earth is in trouble. Factories pour dirty water into our rivers. Many fish die and the water become unhealthy for people to drink. Cars and factories put poisons into the air and cause plants, animals and people to get sick. People throw bottles and paper out of their car windows, and the roadside becomes covered with all sorts of wastes. Over the years, people have changed the environment, and we have pollution.
To continue to survive, we must learn how to use the Earth’s resources wisely. We have to change our habits and stop dumping such enormous amounts of industrial waste into the water and air. We must cooperate with nature and learn better ways to use, not to abuse, our environment.
选项
A、About 80 miles per second.
B、About 70 miles per second.
C、About 18 miles per second.
D、About 17 miles per second.
答案
C
解析
根据短文的第二句话“We move around the sun at l8miles per second and never stop.”可知C项是正确的。
转载请注明原文地址:https://tihaiku.com/zcyy/3498587.html
相关试题推荐
【B1】[br]【B10】[originaltext]Asummaryofthephysicalandchemicalnatureofl
【B1】[br]【B9】[originaltext]Asummaryofthephysicalandchemicalnatureofli
【B1】[br]【B6】[originaltext]Asummaryofthephysicalandchemicalnatureofli
【B1】[br]【B3】[originaltext]Asummaryofthephysicalandchemicalnatureofli
【B1】[br]【B2】[originaltext]Asummaryofthephysicalandchemicalnatureofli
[originaltext]PresidentBushhasproposedtoincreasethestudyofforeignlang
[originaltext]PresidentBushhasproposedtoincreasethestudyofforeignlang
[originaltext]Everywhere,wateruseisincreasing.Humansalreadyuse54percen
[originaltext]Everywhere,wateruseisincreasing.Humansalreadyuse54percen
[originaltext]W:Hello,Gary.How’reyou?M:Fine!Andyourself?W:Can’tcompl
随机试题
情景:你们戏剧小组(dramagroup)要举行会议来讨论“英语之夜”出演的戏剧(play)。任务:请你就此用电子邮件给王教授写一封50词左右的邀请
Thepresident’s______remarksinhisspeechmetwithalotofattacksfromothe
Allofthefollowingaretrueexceptthat______.[br]Thosewhoviolatedthera
肾上腺素的生理作用包括()。A.使心跳加快,心肌收缩力增强,心输出量增加
A.f(-x,y)=f(x,y),f(x,-y)=-f(x,y) B.f(-x
狂犬病患者咽肌痉挛发作最常见的诱发因素是()。A.流水声 B.强光 C.噪
A. B. C. D.
下列关于流动性比例的叙述中,错误的是()。A.流动性比例的计算公式为:流动性比例
共用题干 一般资料:求助者,男性,21岁,大学三年级学生,因担心毕业找不到工作
女,36岁。因急性一氧化碳中毒入院,治疗1周后症状消失出院。2月后突然出现意识障
最新回复
(
0
)