首页
登录
职称英语
Space is a dangerous place, not only because of meteors but also because of
Space is a dangerous place, not only because of meteors but also because of
游客
2023-10-18
39
管理
问题
Space is a dangerous place, not only because of meteors but also because of rays from the sun and other stars. The atmosphere again acts as our protective blanket on earth. Light gets through, and this is essential for plants to make the food which we eat. Heat, too, makes our environments tolerable and some ultraviolet rays penetrate the atmosphere. Cosmic rays of various kinds come through the air from outer space, but enormous quantities of radiation from the sun are screened off. As soon as men leave the atmosphere they are exposed to this radiation but their spacesuits or the walls of their spacecraft, if they are inside, do prevent a lot of radiation damage.
Radiation is the greatest known danger to explorers in space. The trouble is that it is extremely difficult to be sure about radiation damage—a person may feel perfectly well, but the cells of his or her sex organs may be damaged, and this will not be discovered until the birth of(deformed)children or even grandchildren.
Drugs might help to decrease the damage done by radiation, but no really effective ones have been found so far. At present, radiation seems to be the greatest physical hazard to space travelers, but it is impossible to say just how serious the hazard will turn out to be in the future.
Directions: Answer the following questions with the information given in the passage in a maximum of 10 words for each question. [br] When will the damage be discovered?
选项
答案
Radiation damage may show only in later generation.
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3108814.html
相关试题推荐
"Lookatthoseprettygirls’skirts"is________,becauseitisnotclearwhether
Mostenvironmentalproblemsexistbecauseadequatemeasuresforpreventingthem_
Theonlychildisthoroughly________becausehisparentsalwaysgivehimwhatever
Veryfewpeoplecouldunderstandthelecturetheprofessordeliveredbecauseits
Thiskindofworkishardanddangerous.But________,youwouldbecomerich.A、wo
I________tohimbecausehephonedmeshortlyafterwards.A、neednottohavewritt
(1)BecauseImarriedaphotographer,oncewehadchildren,ourholidaycard
PassageThree[br]WhydidthecoupleneedRobCarrick’shelp?Becausetheyhadd
PassageOne[br]Whydidtheauthorshutdownhercomputerabruptly?Becausethe
Itwillbesafertowalkthestreetsbecausepeoplewillnotneedtocarrylarge
随机试题
Thesedays,peoplewhodo【C1】______workoftenreceivefarmoremoneythanpe
[originaltext]W:Hey,Dave!Ihaven’tseenyouforages.Howhaveyoubeen?M:
Insuranceisthesharingof【C1】______.Nearlyeveryoneisexposed【C2】______r
What’sthemeaningof"Clips"inthefirstparagraph?[br]Wecan’inferredfrom
()是指先计算各分项工程的实物工程量,后套用预算定额计算人工、材料、机械台班
在生物钟的作用下,蓝藻在日出之前即可提前动员光合作用系统,在阳光一出现的时候就可
接送学生的机动车驾驶员应当身体健康,具备相应准驾车型( )以上安全驾驶经历,最
Cautela在1966年建议使用的改良的厌恶疗法是( )。A.渐进式厌恶法
急性粟粒型肺结核治疗方案中可选A.异烟肼、卡那霉素、吡嗪酰胺 B.异烟肼、链霉
支气管淋巴结结核出现类似百日咳样痉挛性咳嗽是由于A、淋巴结压迫支气管使其部分阻塞
最新回复
(
0
)