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
2023-07-27
39
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 six 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. Then the water returns to 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 rivers. Many fishes die and the water become unhealthy for people to drink, Cars and factories put poisonous gas 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 at the same time we cause 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 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
转载请注明原文地址:https://tihaiku.com/zcyy/2874939.html
相关试题推荐
[originaltext]Doyouknowthatthere’sakindofbirdthatcansew?Thisbi
[originaltext]Doyouknowthatthere’sakindofbirdthatcansew?Thisbi
[originaltext]Spacemenhavetobespeciallytrainedfortravelinginspace.
[originaltext]W:Thoughmanypeoplewanttohaveahappyfamilyandmarriage,t
[originaltext]W:Thoughmanypeoplewanttohaveahappyfamilyandmarriage,t
[originaltext]W:Thoughmanypeoplewanttohaveahappyfamilyandmarriage,t
[originaltext]LastsummerIwasworkinginWashington,D.C.,asanintern
[originaltext]LastsummerIwasworkinginWashington,D.C.,asanintern
[originaltext]M:Areyouclosetoyourparents?W:Yeah,we’reclose.Myfather
[originaltext]W:Goodmorning.I’mheretoseeMrEdison.M:MrEdisonwentto
随机试题
IntheUnitedStatesandinmany【51】countriesaroundtheworld,therearefo
【B1】[br]【B4】therefore→however语篇逻辑错误。本句前一个分句指出:在这两种区分之后的观点是主观标准不会获得最大满足。第二个分句的意
Asweknow,ifwewanttokeepourhealthyandhaveastrongbody,oureatin
Thefollowingisalistoftermsrelatedtomarketing.Afterreadingit,youare
关于运输合同的说法,正确的是()。A.收货人和托运人任何情况下都不是同一人
基于本量利分析的利润敏感性分析主要研究的问题包括( )。A.有关因素发生多大变化
在蛋白质测定方法中,利用蛋白质具有重复肽键结构特点设计的血清总蛋白质测定方法是(
隔离开关机构箱应设置可自动投切的驱潮加热装置,定期检查驱潮加热装置运行正常、投退
教师职业道德行为的出发点是() A.教师职业正义感B.教师职业责
下列关于目标控制计划的说法中,正确的有()。A、计划不仅是工程实施的依据,也是对
最新回复
(
0
)