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
2024-02-29
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/3492286.html
相关试题推荐
[originaltext]Itismyfirmbeliefthatmenandwomenareequal.Icannotaccep
[originaltext]Itismyfirmbeliefthatmenandwomenareequal.Icannotaccep
[originaltext](Huwantstogettohisseat—awindowseat.)Hu:Excuseme,sorry
[originaltext](Huwantstogettohisseat—awindowseat.)Hu:Excuseme,sorry
[originaltext]Adesignforaremotely-controlledfireenginecouldmakelongro
[originaltext]Adesignforaremotely-controlledfireenginecouldmakelongro
[originaltext]Adesignforaremotely-controlledfireenginecouldmakelongro
[originaltext]Environmentalistssaypollutionisterribleandbecomingworse.B
[originaltext]Environmentalistssaypollutionisterribleandbecomingworse.B
[originaltext]M:Weren’ttheresupposedtobeabout40peopleenrolledinthec
随机试题
[originaltext]Amilitantgrouplinkedtoal-QaidahastakencreditforWednes
如何理解物流管理的目标?
平均利润形成之后,价值规律的作用形式表现为市场价格围绕()A.生产成
已知某客运站近10年5月1日客流量数据资料如下: 采用简单平均法预测202
夏枯草的药用部位是A.全草 B.枝叶 C.根 D.带花的果穗 E.叶片
形成寒从中生的原因,主要是A.心肾阳虚,温煦气化无力 B.肺肾阳虚,温煦气化失
共用题干 SmartphoneCustomersupforGrabAb
In1816itseemedinevitablethatSouth
影响股指期货期现套利交易总成本的因素包括()等。A.借贷利率差 B.买卖手续
关于小儿机体发育的规律,下列说法正确的是A.是一个连续平均的过程 B.年龄越大
最新回复
(
0
)