问题
单项选择题 A2型题
某广告说用某药治疗了100例某病病人,其中95例痊愈,治愈率达95%。此治愈率不可信的主要原因是()
A.所治病例数过少
B.缺少对照组
C.治愈率太高
D.没有经过统计学检验
E.没有关于偏倚控制的说明
答案
参考答案:B
某广告说用某药治疗了100例某病病人,其中95例痊愈,治愈率达95%。此治愈率不可信的主要原因是()
A.所治病例数过少
B.缺少对照组
C.治愈率太高
D.没有经过统计学检验
E.没有关于偏倚控制的说明
参考答案:B
完形填空。 | |||
My sister is 1 policewoman. She 2 in the Police Station in Binzhou. She likes her job. She says the work 3 very exciting but kind 4 dangerous. She is good 5 sports. She 6 singing. She 7 very well. She often helps people in trouble(处于困境). Sometimes she works 8 Sundays and Festivals. Bad people 9 like her. I want 10 a policeman like my sister when I grow up(长大). | |||
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