首页
登录
职称英语
A study found that 70 percent of children surveyed in 1970 had at one time had c
A study found that 70 percent of children surveyed in 1970 had at one time had c
游客
2024-01-13
66
管理
问题
A study found that 70 percent of children surveyed in 1970 had at one time had cavities, whereas only 50 percent of those surveyed in 1985 had ever had cavities. The researchers concluded that the level of dental disease in children had declined between 1970 and 19Which of the following, if true, would most seriously undermine the researchers’ conclusion presented above?
选项
A、Cavities are the most common kind of dental disease to which children are subject.
B、The children surveyed came from a broad variety of income backgrounds.
C、The children surveyed were selected from among students of teachers cooperating with the researchers.
D、The accuracy of cavity detection techniques has improved dramatically since 1970.
E、The children surveyed in 1985 were younger on average than those surveyed in 1970.
答案
E
解析
本题属于“B,A”型,反对的思路是“有他因”。(E)指出1985年调查有牙洞的孩子减少是因为1 985年调查的孩子要比1 970年调查的孩子要小,因此使得段落推理结论“孩子中的牙病水平降低了”被削弱;(A)、(B)与“牙痛水平的降低”无关;(C)没有区分1970年与1985年;(D)起到了支持作用。
转载请注明原文地址:https://tihaiku.com/zcyy/3358405.html
相关试题推荐
Hedevotedhiswholelifeto_____careofthedisabledchildren.A、takesB、taking
Mr.andMrs.Wrighthavegotninechildren—it’sreallyabig______.A、homeB、fami
Homeworkshouldnotbeusedasa______ofcontrollingchildren.A、meaningB、meanC
Mr.Jonesenjoys______hischildrenoutforlongwalks.A、takeB、takesC、totakeD
Ourchildrenandgrandchildrenwill______ifwedon’tlookafterourplanet.A、e
AstheTitanicwassinkingandwomenandchildrenclimbedintolifeboats,the
AstheTitanicwassinkingandwomenandchildrenclimbedintolifeboats,the
AstheTitanicwassinkingandwomenandchildrenclimbedintolifeboats,the
AstheTitanicwassinkingandwomenandchildrenclimbedintolifeboats,the
_________language,mathsandhistory,thechildrenarealsotaughtmusicandart
随机试题
Probablythere’sagoodreasonforherabsence,asshedoesn’tusuallystayaway
[originaltext]W:Goodevening!WelcometoourTalkShowprogram.Ourguesttoda
Heredity(遗传)isnottheonlythingthatinfluencesourcolor.Whereandhow
BasicsaboutSpringBreakSafety1.Travelsafety■Validdriving【T1】______
阅读材料,回答问题。 材料 “帝纣闻武王来,亦发兵七十万人距武王。武王使师尚
女性,32岁,原发不孕3年,月经规律,基础体温双相,基础内分泌检查正常,HSG示
建设中的某地线路穿行在城市繁华地带,地面道路狭窄,建筑物老旧密集,地下水丰富。
脂肪肉瘤的特点包括A.好发于皮下脂肪组织 B.常由脂肪瘤恶变而来 C.常出现
基础心理学是研究()。 (A)正常成人心理现象的心理学基础学科 (B
下列属于预防内源性生殖道感染的措施的是A.推迟首次性行为的时间 B.每天应使用
最新回复
(
0
)