首页
登录
职称英语
What percentage of the world’s known petroleum reserves does Kuwait have? [origi
What percentage of the world’s known petroleum reserves does Kuwait have? [origi
游客
2024-10-29
25
管理
问题
What percentage of the world’s known petroleum reserves does Kuwait have?
Not long ago it was assumed that the dangers man would meet in space would be terrible, the main ones being radiation and the danger of being hit by meteors. It is per- haps worth remembering that less than two centuries ago the dangers of train travel seemed similarly terrible. A man would certainly die, it was thought, if carried along at a speed of thirty kilometers per hour.
There are two sorts of radiation man must fear in space. The first is radiation from the sun, and this is particularly dangerous when the sun is very active and explosions are occurring on its surface. The second, less harmful form comes from the so-called Van Allen Belts. These are two areas of radiation about 1,500 miles away from the earth. Neither of these forms of radiation area is dangerous to us on the earth, since we are protected by our atmosphere. Specifically, it is that part of our atmosphere known as the ozonosphere which protects us. This is a belt of the chemical ozone between 12 and 21 miles from the ground, which absorbs all the radiation.
Once outside the atmosphere, however, man is no longer protected, and radiation can be harmful in a number of ways. A distinction must be drawn between the short-and long-term effects of radiation. The former are merely unpleasant, but just because an astronaut returning from a journey in space does not seem to have been greatly harmed, we cannot assume that he is safe. The long-term effects can be extremely serious, even leading to death.
选项
A、13%.
B、16%.
C、14%.
D、15%.
答案
D
解析
原文已经很明确地告诉了我们答案:“ it has approximately fifteen per cent of the world’s known petroleum reserves.”。
转载请注明原文地址:https://tihaiku.com/zcyy/3822852.html
相关试题推荐
Asamatteroffact,SaudiArabia’soilreserves_________thoseofKuwait.A、com
WhatisthepercentageoftotaldeclineinvehiclesalesinAprilthisyear?[br
WhatisthepercentageoftotaldeclineinvehiclesalesinAprilthisyear?[or
Whichofthefollowingstockindexesgotthehighestrisingpercentage,moretha
Whichofthefollowingstockindexesgotthehighestrisingpercentage,moretha
Asamatteroffact,SaudiArabia’soilreserves______thoseofKuwait.A、comesec
WhatisthepercentageofcollegegraduatesgettingjobsthroughuniversityCare
Petroleumproducts,suchasgasoline,kerosene,homeheatingoil,residual
Petroleumproducts,suchasgasoline,kerosene,homeheatingoil,residual
Petroleumproducts,suchasgasoline,kerosene,homeheatingoil,residual
随机试题
我国导游证采用电子证件形式,由国务院旅游主管部门制定格式标准,由各级旅游主管部门
下列选项不属于影响发病的主要因素是()A.气候 B.体质 C.地域
甲状腺自身抗体的检测在临床上的应用正确的是A:是确诊是否有甲状腺疾病的指标B:
下列不属于栓剂硬化剂的是A.白蜡 B.硬脂酸铝 C.硬脂酸 D.鲸蜡醇
聂海胜;张晓光;王亚平 正确选项为():A.杨利伟;费俊龙;聂海胜 B.翟
举例说明语言的各级结构。
某商业银行大厅中有专人负责向前来储蓄的客户介绍不同种储蓄产品的区别,这属于理财顾
(2018年真题)下列税种中,最不容易转嫁的是()。A.关税 B.房产税
根据企业所得税法律制度的规定,下列各项中,属于转让财产收入的有()。A.销售包
(2019年真题)关于建设工程刑事责任的说法,正确的是( )。 A.刑事责任
最新回复
(
0
)