首页
登录
职称英语
Scientists have rediscovered certain food crops, once commonly cultivated in the
Scientists have rediscovered certain food crops, once commonly cultivated in the
游客
2025-02-26
19
管理
问题
Scientists have rediscovered certain food crops, once commonly cultivated in the New World, which contain more protein per pound than do current staple food crops such as rice and wheat. Scientists claim that cultivation of these crops could greatly benefit densely populated countries that have low per-person caloric intake and inadequate source of protein. Which of the following, if true, casts the most serious doubt on the claim made above?
选项
A、The average yield per acre of the rediscovered crops is substantially less than that of the current staple food crops.
B、Many important food crops, such as tomato, originated in the New World.
C、Wheat yields more protein per pound than does rice.
D、The rediscovered crops have more caloric per pound than do current, staple food crops.
E、As few as 20 different food crops provide the bulk of the planet’s food supply.
答案
A
解析
本题根据每磅这种谷物的蛋白质含量高于其他主要农作物而做出这种谷物对人口稠密、人均摄入量低和蛋白质来源不足的国家有好处的结论。很显然本题的结论是以这种谷物的产量比其他主要农作物高或至少不能比其他农作物的明显地低为前提。(A)指出“新发现的农作物的每亩平均产量比目前粮食作物产量低得多,从而严重地削弱了结论所依赖的一个前提条件,因此(A)正确。(B)和(E)为无关选项;(C)和(D)引入新的比较,所以也都为错误选项。
转载请注明原文地址:http://tihaiku.com/zcyy/3973244.html
相关试题推荐
Thenumberofpeoplediagnosedashavingacertainintestinaldiseasehasdroppe
Becausedinosaurswerereptiles,scientistsonceassumedthat,likeallreptiles
Itiscommonlyheldamongmarketingexpertsthatinanonexpandingmarketacomp
Agroupofscientistsstudyingcalciummetabolisminlaboratoryratsdiscovered
Corporateofficersanddirectorscommonlybuyandsell,fortheirownportfolios
Thetoxinproducedbycertainmarinesnailscontainsvariousproteins,oneofwh
Onlycomputerscientistsunderstandthearchitectureofpersonalcomputers,and
ProfessorRobinson:Alargemeteoriteimpactcraterinacertainregionwasthou
Privateindustryistryingtoattractskilledresearchscientistsbyofferingth
Inlargedoses,analgesicsthatworkinthebrainasantagoniststocertainchem
随机试题
Studentswhopasstheexamcalled"the11-plus"inBritaincangotoA、grammarsc
主管人员的考评方法有个演变过程,一般包括以下哪些阶段?()A.传统的个人品质考
为了确定非常态网络的复杂阶数,可以用短路的方法,确定网络中的纯电容回路数(
根据货币资金业务内部控制的要求,出纳员可以承担的职责是()。A.登记现金日记账
蓄电池出口直流断路器(熔断器)应有(____)报警功能。跳闸$;$过电流$;$过
能够从上述资料中推出的是:A.1月份人均产值最大的是乙车间 B.除丙车间外
对某投资方案进行单因素敏感性分析,选取的分析指标为净现值NPV,考虑投资额、产品
甲、乙、丙三国均为WTO成员国,甲国给予乙国进口丝束的配额,但没有给予丙国配额,
白带丸除能除湿止带外,又能A.止痒 B.止痛 C.燥湿 D.益气 E.清
下列各项中,企业确认当期销售部门使用车辆应交纳的车船税,应借记的会计科目是()
最新回复
(
0
)