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
2024-02-03
33
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] 【B6】
选项
答案
contains
解析
根据空格前的并列连词and和空格后的名词短语little or no beta-carotene可知,此空需填入谓语,与and前的is一起作句子的并列谓语。contain“包含”。
转载请注明原文地址:http://tihaiku.com/zcyy/3419424.html
相关试题推荐
Manypeoplebelievetheglarefromsnowcausessnowblindness.Yet,darkgla
Manypeoplebelievetheglarefromsnowcausessnowblindness.Yet,darkgla
[originaltext]Withthedevelopmentofthecomputer,thepossibilityofstor
[originaltext]Withthedevelopmentofthecomputer,thepossibilityofstor
[originaltext]Withthedevelopmentofthecomputer,thepossibilityofstor
Teachingchildrentoreadwellfromthestartisthemostimportanttaskof
[originaltext]Aboutfiftydifferentvitaminshavebeenidentified,andade
PreparingChildrentoBeSafeatCollegeA)Moneycanbuymany
PreparingChildrentoBeSafeatCollegeA)Moneycanbuymany
PreparingChildrentoBeSafeatCollegeA)Moneycanbuymany
随机试题
Whatdoesthebeggarmeanbysaying"forthefirsttimeIfeelrespected"?[br]
Beliefs,whicharetypicallypartial,oftenwrongandofteninconsistent,butma
TherearemanytheoriesaboutthebeginningofdramainancientGreece.The
TheU.S.dollarwassupposedtobeattheendofitsrope.Kickingthebucke
骨髓移植A.可治疗严重联合免疫缺陷病 B.可治疗细胞免疫缺陷 C.可治疗腺苷
简述计算机病毒的传播途径。
土压式盾构开挖控制的项目包含( )。 A、开挖面稳定 B、土压 C、
下列选项中,能由所给的图形组成的是: A.如上图所示 B.如上图所示 C.
我是小强,我没时间吃晚饭;我是王继伟,我没时间长途旅行;我是张慧,我没时间睡午觉
有关新建工作簿有下面几种说法,其中正确的是()。A、新建工作簿可以使用Shift
最新回复
(
0
)