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
72
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
Afewyearsago,auniversityprofessortriedalittleexperiment.HesentChris
Thebrainsofchildrenareaffectedbyfamilyviolenceinthesamewayasc
Overthepastcentury,thecompositionofthehumangenepool______appreciably
Manypeoplecatchacoldinthespringtimeorfall.Itmakesus【T1】______:if
当管道为热态吊零时,工作荷载等于();当管道为冷态吊零时,()等于分配荷
A.竹沥、天竺黄B.半夏、旋覆花C.天南星、白附子D.竹茹、枇杷叶E.海蛤壳、海
业主大会议事规则是业主大会组织、运作的规程,由()制定和修改。A:房产开发建设单
中外经济界人士认为,化解世界经济危机、推动可持续增长,仅靠中国一枝独秀是不现寒的
公积金个人住房贷款贷后管理的内容包括()。A.贷款手续费的结算 B.贷款数据
(2018年真题)下列关于同业拆借的表述,正确的有()。A.同业拆借利率的
最新回复
(
0
)