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
37
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
Completethetablebelow.WriteNOMORETHANTHREEWORDSforeachanswer.[img]2
Beforeinvestingincommonstocks,oneshouldbeawareofboththeiradvanta
StocksintheUnitedStates______onWednesday.[originaltext]Stockssurged
答:0
下列关于外环境与疾病发生关系的叙述,错误的是( )。A.久视伤血 B.久坐伤
太阳经头痛一般表现在A.顶颞部 B.后枕部 C.前额部 D.顶部 E.颞
共用题干 第二篇TheFirstNavigationalLightsIn
郑板桥画竹绝非凭空臆造、灵感所至,而是长期潜心观察、细致体味的结果。郑板桥观察生
(2017年真题)下列关于工程施工招标踏勘现场的说法,正确的有( )。A.所有工
(2020年真题)关于风管计算规则正确的是( )A.不锈钢碳钢风管按外径计算
最新回复
(
0
)