首页
登录
职称英语
All the useful energy at the surface of the earth comes from the activity of
All the useful energy at the surface of the earth comes from the activity of
游客
2025-03-07
17
管理
问题
All the useful energy at the surface of the earth comes from the activity of the sun. The sun heats and feeds creatures and mankind. Each year it provides men with two hundred million tons of grain and nearly ten million tons of wood, coal, oil, natural gas, and all other fuels are stored energy from the sun. Some was collected by this season’s plants as carbon compounds. Some was stored by plants and trees ages ago. Even waterpower derives from the sun. Water turned into vapor by the sun fails as rain. It courses down the mountains and is converted to electric power. Light transmits only the energy that comes from the sun’s outer layer, and much of this energy that is directed towards the earth never arrives. About nine tenths of it is absorbed by the atmosphere of the earth. In fact, the earth itself gets only one half millionth of the sun’s entire output of radiant energy. [br] Of the sun’s total output of radiant energy, the earth receives( ).
选项
A、one tenth
B、one millionth
C、all that comes from the surface of the sun
D、a verysmall portion
答案
D
解析
事实细节题。文中最后一句说,事实上,地球只接收了太阳所有辐射能量的百万分之零点五,所以是相当小的一个比例。
转载请注明原文地址:https://tihaiku.com/zcyy/3985919.html
相关试题推荐
Treesareusefultomaninthreeimportantways:theyprovidehimwithwood
Treesareusefultomaninthreeimportantways:theyprovidehimwithwood
Treesareusefultomaninthreeimportantways:theyprovidehimwithwood
Treesareusefultomaninthreeimportantways:theyprovidehimwithwood
Treesareusefultomaninthreeimportantways:theyprovidehimwithwood
Treesareusefultomaninthreeimportantways:theyprovidehimwithwood
Alltheusefulenergyatthesurfaceoftheearthcomesfromtheactivityof
Alltheusefulenergyatthesurfaceoftheearthcomesfromtheactivityof
Alltheusefulenergyatthesurfaceoftheearthcomesfromtheactivityof
Howcanwegetridofgarbage?Dowehaveenoughenergysourcestomeetour
随机试题
[originaltext]Thisisthe59thannualTonyAwardsceremonybroadcastnationwi
[originaltext]Inthecaseofmobilephones,changeiseverything.[32]Rece
ThecasualtiesfortherivalMuslimmilitiaswere[originaltext]Tankandro
What’sthenewsabout?[br][originaltext]Whenyouheartheword"biodegrada
我国主要的保险品种有()。 Ⅰ人寿保险 Ⅱ健康保险 Ⅲ财产保险
患者小便热涩刺痛,尿色深红,夹有血块,心烦,舌苔黄,脉滑数。其治法是A.清热泻火
在WORD中,不能操作实现的是:( )A.在页眉中插入日期 B.建立奇偶内容
证券登记按证券种类划分,不包括()。A:股份登记B:基金登记C:期货登记D
关于施工现场临时照明的说法,正确的是( )。A.一般场所宜选用额定电压为36V
铁路线路两侧应当设立铁路线路安全保护区。城市郊区居民居住区高速铁路的安全保护范围
最新回复
(
0
)