首页
登录
职称英语
Lack of Vitamin A is the leading cause of blindness among children in develo
Lack of Vitamin A is the leading cause of blindness among children in develo
游客
2023-07-02
43
管理
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. [br] 【B8】
选项
答案
official
解析
根据空格前的a research可知,此空需填入单数形式的名词。official“官员”。
转载请注明原文地址:https://tihaiku.com/zcyy/2803160.html
相关试题推荐
Whenchildrenhitpuberty(青春期),theirabilitytolearnasecondlanguagedro
Whenchildrenhitpuberty(青春期),theirabilitytolearnasecondlanguagedro
Whenchildrenhitpuberty(青春期),theirabilitytolearnasecondlanguagedro
Whenchildrenhitpuberty(青春期),theirabilitytolearnasecondlanguagedro
Whenchildrenhitpuberty(青春期),theirabilitytolearnasecondlanguagedro
Beginninginthe1950sand1960s,Japanbegandevelopingareputationforit
Beginninginthe1950sand1960s,Japanbegandevelopingareputationforit
Sendingyourchildrentopianoorviolinlessonsinabid(努力)toboosttheir
Sendingyourchildrentopianoorviolinlessonsinabid(努力)toboosttheir
Sendingyourchildrentopianoorviolinlessonsinabid(努力)toboosttheir
随机试题
[originaltext]London,theUnitedKingdomTheUKhousingmarketisseeinga
Ifyou’reoneofthosepeoplewhotendstoputonweightaroundyourmiddle,
请根据以下内容给香港航空公司写信预订机票。本公司营业部主任陈先生定于6月19日抵达波士顿,逗留数日后,将继续前往渥太华。敬请贵公司保留6月24日
常微分方程2y2sinxcosxdx+(2ysin2x+3y2)dy=0
给水引入管与排水排出管的水平净距不得小于()m。A.1 B.1.5 C.2
下列哪种情况下,首选异丙肾上腺素A.传染病引起心搏骤停 B.药物中毒引起心搏骤
继发性甲状腺功能减退时,甲状腺激素的含量变化是A.T,T升高,TSH下降B.T,
患者,男性,50岁,胃大部切除术后第一天。患者生命体征平稳,伤口无渗出血,禁食,
现在由90%的人过于关注食品安全问题,对于营养的理解,大多数人还停留在“营养问题
下列哪一项不属于“推定医疗机构有过错”的情形?A.违反法律、行政法规、规章以及其
最新回复
(
0
)