首页
登录
职称英语
The best title for this selection is [br] [originaltext] Do you know how as
The best title for this selection is [br] [originaltext] Do you know how as
游客
2023-11-19
32
管理
问题
The best title for this selection is [br]
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.
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!
Besides non-spoilable foods, scientists can now make foods from non-food materials. Coal, gas, and other non-foods 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 down to a bowl of coal and a glass of gas.
选项
A、foods from non-food materials.
B、foods in plastic tubes.
C、freeze-dried foods.
D、eatable food packages.
答案
A
解析
B 说的是包装食物的方式,C 说的是食物的保存方法,这两者都不是解决食物短缺的办法,故很有可能都不是答案。短文中提到“scientists can now make foods from non-food materials”,由此可知,答案为A 。
转载请注明原文地址:https://tihaiku.com/zcyy/3199549.html
相关试题推荐
Whenwastheterm"theGenerationX"madeup?[originaltext]W:Sowhatyearwere
Abouthowmanydogsandcatsaredestroyedeachyear?[br][originaltext]O
Abouthowmanydogsandcatsaredestroyedeachyear?[originaltext]Oneof
Whatisthecasualtynumberoftheaccident?[br][originaltext]Fourpeopl
WherewasSberrillgoingwhenFillmether?[originaltext]M:Hi,Sherril.W:Hel
Whatwastrueofthedemonstrators?[br][originaltext](28[C])Some150Sou
Whatwastrueofthedemonstrators?[originaltext](28[C])Some150SouthKor
WhatwasIsraelidiplomat,JosefHassinechargedwith?[originaltext]NewDe
Whatisthemaintopicofthepassage?[br][originaltext]Japanese-stylec
Whatisthemaintopicofthepassage?[br][originaltext]Japanese-stylec
随机试题
DaveWalsh,webeditoronboardtheRainbowWarrioragainthisyear,gaveth
OnMarchI,areader’sletterpublishedinLianheZaobao’sForumpagewiththeh
Peopletodayarestilltalkingaboutthegenerationgap(代沟).Someparentsco
对儿童牙齿可能产生不良影响的药是()A.氯霉素 B.红霉素 C.庆大霉素
关于卖出看跌期权的损益(不计交易费用)以下说法正确的是()。A、最大收益为所收
A.六淫B.疠气C.七情D.饮食失宜E.痰饮属于内伤病的一类致病因素的是()。
下列各类收入(收益)中,无需缴纳个人所得税的是:A.居民个人购买国债所获得相应利
为了估计当前人们对管理基本知识掌握的水平,《管理者》杂志为读者开展了一次管理知识
中央银行具有“发行的银行”、“银行的银行”、“政府的银行”三大银行,其中与“政府
拌合设备生产能力主要取决于()等因素。A.混凝土浇筑强度 B.设备容量 C
最新回复
(
0
)