首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
The best title for this selection is ______.
The best title for this selection is ______.
admin
2013-09-28
43
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://kaotiyun.com/show/vgLK777K
0
专业英语四级
相关试题推荐
Geographyisstudyoftherelationshipbetweenpeopleandtheland.Geographerscompareandcontrast【C1】______placesontheea
Besidesastronauts,whatelseisNASAgoingtobringtoSpaceStation?
WriteonANSWERSHEETTWOanoteofabout50~60wordsbasedonthefollowingsituation:Youjustgotrecoveredfromillness.
Whichofthestatementsdoyouthinkcouldnotcauseadrivertohaveanaccident?
AmongAmericaninnovators,nobodycomesclosetothedefininglegacyofSteveJobs.Itiscommonly【C1】______.HewasnotanEdis
ControlanUniversityLogisticNumber,BoycottSchoolFeesRiseOverthelasttwodecades,collegesanduniversitiesdoubled
Inwinterdrivershavetroublestoppingtheircarsfrom______onicyroads.(2000年考试真题)
Factoriesaresuppliedwith______machines.
Iwouldappreciate______tomeetmeattheairport.
Wearelongingfortheworld______peaceful.
随机试题
患者,男性,50岁,右上6的远中边缘嵴缺损与右上7之间有食物嵌塞,最佳的修复方式为
A.引起急性呼吸道传染病B.引起主要表现为严重呕吐、腹泻的传染病C.引起经性接触引起的传染病D.引起常见的人畜共患疾病E.引起急慢性胃炎、消化性溃疡的主要原因)钩端螺旋体
砌体结构的受压承载力系数φ:
经济学认为,政府干预经济的理由在于()。
根据《建设工程施工合同(示范文本)》(GF—99—0201)规定,()签发后,承包人可按专用合同条款约定的人数和期限向监理人提交最终结清申请单,并提供相关证明材料。
下列关于横道图进度计划法说法中,错误的是()。
下列说法中,符合会计政策定义的是()。
关于国家出资企业董事、高级管理人员和监事的兼职限制,下列说法中,错误的是()。
在地陪的前期业务准备中,关于落实团队预订服务的规范操作程序包括哪些工作内容?
所谓环境资源商品化就是赋予自然以经济价值,并将环境纳入市场经济体系中,将环境转化成像其他商品那样也可以进行分析的产品。只要在经济改革中赋予环境适当的价值,环境就能得到更好的保护。这种观点认为,各种生态环境问题的出现,正是由于资源环境没有被视为商品,没有拿到
最新回复
(
0
)