首页
登录
职称英语
The best title for this selection is ______. [originaltext] Do you know how
The best title for this selection is ______. [originaltext] Do you know how
游客
2023-11-06
15
管理
问题
The best title for this selection is ______.
Do you know how astronauts act while whirling through space? Their food comes in plastic tubes, and they eat it from the tubes. Why? Spacecraft food must be light and easy to store. It must also be non-spoilable. Many of the foods made for eating in a spaceship have been a success. In fact, everyone may soon be able to have them!
Scientists have learned to keep some foods from spoiling by removing the oxygen from them. This is done by pumping nitrogen gas into them, forcing nearly all the oxygen out. Without oxygen, bacteria cannot grow, nor can the foods spoil.
(12[D])Freeze-drying is another way to keep food from spoiling. First the foods are frozen. Then they are dried. Fruits, vegetables, meat, and even ice cream can be freeze-dried. Years later, you can just add milk or water, and they’re ready to be eaten. And freeze-dried foods need no refrigeration!
(13[A])Besides non-spoilable foods, scientists can now make foods from non-food materials. Coal, gas, and other nonfoods have been turned into foods. By treating these materials with bacteria, scientists can produce rich proteins.
Experts say that four out of five of the world’s people do not eat enough protein. Man-made proteins could help people in needy areas. But it should be a long time before we sit clown to a bowl of coal and a glass of gas.
选项
A、Food from Coal and Gas
B、Non-Spoiling and New Foods
C、Spacecraft Food
D、The Shortage of Food
答案
B
解析
主旨题。整个文章中重点介绍了如何使食品不腐烂,如何用非食用材料制成食品,故选B 。
转载请注明原文地址:https://tihaiku.com/zcyy/3164653.html
相关试题推荐
Whatisthenewitemmainlyabout?[br][originaltext]Well,movingaroundt
Whatisthenewitemmainlyabout?[originaltext]Well,movingaroundtothe
WhodiedlastMonday?[originaltext]Dignitariesfromaroundtheworldhaveb
Whatevidencedidinvestigatorsfailtofind?[br][originaltext]Athree-mo
Whatevidencedidinvestigatorsfailtofind?[originaltext]Athree-monthpr
Thoseconvictedofracismwillbe[originaltext]Finally,theauthoritiesin
Whatisthepassagemainlyabout?[br][originaltext]Settlersoriginallyca
Whatisthepassagemainlyabout?[br][originaltext]Settlersoriginallyca
Whatisthepassagemainlyabout?[originaltext]Settlersoriginallycameto
Whowerethefirstinsurancecontractsdesignedtoprotect?[br][originaltext]
随机试题
Since2007,theAmericanPsychologicalAssociation(APA)hasconductedasurve
"Peopleworkmoreproductivelyinteamsthanindividually.Teamworkrequires
某双代号网络计划中,工作A的最早开始时间和最迟开始时间分别为第10天和第13天,
女,32岁。G2P1,丈夫在外省工作,拟回家探亲,欲采用探亲避孕药避孕。探亲避孕
患儿,5岁。诊断为病毒性心肌炎。以胸闷胸痛,头晕乏力,心悸不适,脘痞痰多,时欲呕
《特种设备安全监察条例》所指的锅炉,是指利用各种燃料、电或者其他能源,将所盛装的
停工留薪期一般不超过( )。A.6个月 B.12个月 C.18个月 D.
A.-lna B.lna C. D.1/2
人在每一瞬间,将心理活动选择了某些对象而忽略了另一些对象。这一特点指的是注意的(
班会一般有三类:常规班会、生活班会和()。
最新回复
(
0
)