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
Lack of Vitamin A is the leading cause of blindness among children in developing countries. These children do not get enoug
Lack of Vitamin A is the leading cause of blindness among children in developing countries. These children do not get enoug
admin
2016-03-29
67
问题
Lack of Vitamin A is the leading cause of blindness among children in developing countries.
These children do not get enough Vitamin A in the food they eat.
In Africa, more than 3,000,000 children【B1】______blindness or sickness caused by lack of Vitamin A Scientists say sweet potatoes are rich in beta carotene(β-胡萝卜素)—the natural orange-colored【B2】______ that the human body needs to produce Vitamin A.
One recent study found that orange-colored sweet potatoes are an excellent food for families in southern and eastern Africa. Scientists from Kenya, Uganda and the International Potato Center in Peru【B3】______ the ten-year study. The scientists found that several kinds of sweet potatoes produce excellent harvests in some areas where Vitamin A【B4】______ is widespread. They said sweet potatoes provided large amounts of Vitamin A at a very low cost.
People in Africa liked the orange-colored sweet potatoes used in the study. Some people had thought Africans would not accept such potatoes because they are sweeter than 【B5】______ sweet potatoes. The traditional African sweet potato is white and 【B6】______ little or no beta-carotene. However, research studies and taste tests showed the new sweet potatoes are able to【B7】______ the local crops. Wanda Collins is a research【B8】______ at the International Potato Center. She says the study found that mothers in Africa accepted the orange-colored sweet potatoes. Women who knew the value of these potatoes continued to buy them when food【B9】______ caused price increases. Ms. Collins says the next step is to develop this【B10】______ crop in other areas of Africa.
【B9】
选项
答案
shortages
解析
此空需填入名词性成分,与前面的food一起构成名词短语,作when所在从句的主语。shortage“不足”,此处是复数形式,词尾勿忘加-s。
转载请注明原文地址:https://kaotiyun.com/show/XJe7777K
0
大学英语四级
相关试题推荐
Therearepeoplewhoareespeciallyattractedtothenotionof"climbingtheladder"soastoincreasetheirstatus,financialp
DefinitionsofObesityA)Howdoesonedefinewhenapersonisconsideredtobeobeseandnotjustsomewhatoverweight?Height-we
DefinitionsofObesityA)Howdoesonedefinewhenapersonisconsideredtobeobeseandnotjustsomewhatoverweight?Height-we
ItIsn’tEasyBeingGreenGreenstoriesofhotelsA)Overthesummer,IstayedatfourhotelsintheUnitedStates.Theywer
Nowadays,manyforeignstudentsflytoChina,acountry【B1】______kilometersfromtheirown,justtolearnthishardlanguage,as
TherehavebeenalotofreportsthatboysareintroubleinAmericaneducation.Somepeoplesay【B1】______toimproveeducationf
A、Windspeed.B、Rainfall.C、Directionofapproach.D、Watertemperature.A信息明示题。男士问女士几种热带天气现象的区别是什么,女士回答说是“windvelocity(风速).Adep
Lookingtoimproveyourlanguageskills,butdon’thavethetimetogooverseastoattendschool?Moreandmoreuniversitiesaro
IdentityTheftA)Identitytheftandidentityfraudaretermsusedtorefertoalltypesofcrimeinwhichsomeonewrongfullyobt
AnimalsontheMoveA)Itlookedlikeascenefrom"Jaws"butwithoutthedramaticmusic.Ahugesharkwaslowlyswimmingthrough
随机试题
影响环境稳定的因素不包括()
某出口商以电报形式向进口商发盘,但在发盘到达进口商之前又以传真告知进口商此发盘无效,此行为属于
像饼图一样,圆环图也显示了部分与整体的关系,但圆环图可以包含多个数据系列。在该类型中有:______,______。
猝死
患者,男性,35岁。一年前开始出现低热、乏力,近半年来逐渐出现四肢关节与肌肉酸痛,举手及登楼困难,同时在眼睑、鼻梁、远端指间关节及甲周围皮肤出现暗红色斑。根据上述检查,给予糖皮质激素治疗,疗程一年半,患者上述症状无改善,肌无力更加严重,行走困难,但肌酶
下列属于内部控制基本要素的是( )。
丁公司2015年12月31日的资产负债表显示,资产总额年初数和年末数分别为4800万元和5000万元,负债总额年初数和年末数分别为2400万元和2500万元,丁公司2015年度营业收入为7350万元,净利润为294万元。要求:计算销售净利率。
请回答下列问题:光反应中能把光能转换成电能的叶绿素是少数处于特殊状态的______。
在中国历史上曾经出现过成康之治、文景之治、贞观之治、康乾之治等所谓盛世。盛世的出现是和法制的相对健全分不开的,法制是推动盛世出现的条件,又是盛世的外在标志。从来没有无法制的盛世,也从来没有盛世而法制衰微的现象。即使是入主中原的少数民族,在立定脚跟之后也急于
根据下面材料回答问题。2012年上半年,石油和化工行业规模以上企业累计总产值5.89万亿元,同比增长12.5%;利润总额3535.4亿元,同比下降15.9%;主营业务收入5.60万亿元,同比增长10.4%;资产总计8.10万亿元,同比增长12.8
最新回复
(
0
)