首页
登录
职称英语
What percentage of the world’s known petroleum reserves does Kuwait have? [br]
What percentage of the world’s known petroleum reserves does Kuwait have? [br]
游客
2024-10-29
41
管理
问题
What percentage of the world’s known petroleum reserves does Kuwait have? [br]
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、Free primary and secondary education
B、Free health care
C、Free social services
D、Free tour to foreign countries
答案
D
解析
“It has free primary and secondary education,free health care and social services”选项A, B,C在课文中都有提及,应该予以排除,只有D符合题目要求。
转载请注明原文地址:http://tihaiku.com/zcyy/3822853.html
相关试题推荐
Asamatteroffact,SaudiArabia’soilreserves_________thoseofKuwait.A、com
Whatpercentageoftheworld’sknownpetroleumreservesdoesKuwaithave?[br]
Whatpercentageoftheworld’sknownpetroleumreservesdoesKuwaithave?[br]
Thepercentageoftheannualdecreaseininfantmortalityratesince1990is___
WhatisthepercentageofcollegegraduatesgettingjobsthroughuniversityCare
EventhoughAfricangamepreserveshavesavedmanyanimals,thereare______tha
Petroleumproducts,suchasgasoline,kerosene,homeheatingoil,residual
Petroleumproducts,suchasgasoline,kerosene,homeheatingoil,residual
Petroleumproducts,suchasgasoline,kerosene,homeheatingoil,residual
Petroleumproducts,suchasgasoline,kerosene,homeheatingoil,residual
随机试题
Everynewtheorynotonlymust(i)____thevalidpredictionsoftheoldtheory,
Anunsettlingfactaboutlungcanceristhatevencleanlivingcannotguara
Theconceptofculturehasbeendefinedmanytimes,andalthoughnodefiniti
WhichofthefollowingisCORRECTabouttheexperiment?A、Sleepingpillsmadepeo
[originaltext]M:CouldyoutellmehowtogettoPeaceHotel?[/originaltext][au
[originaltext]TomSmithwasawriter.Hewrotedetectivestoriesformagazi
简述一下构建现代金融治理框架的三个层次。
共用题干 男,52岁。近3周来感疲乏无力,失眠头痛,不伴恶心、呕吐。随入院检查
根据《出境入境管理法》规定,外国人有下列()情形之一的,可以免办签证。A.属于刑
期货公司主要股东或者实际控制人出现下列情形之一的,应当主动、准确、完整地在3个工
最新回复
(
0
)