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【简答题】
在病例对照研究中,由于调查者事先知道谁是病例谁是对照,于是对病例组的询问十分认真细致,而对照组则不大认真,由此而来的偏倚是
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举一反三
【单选题】今年 4 月 1 日,是河北雄安新区设立( )周年。据新华社 4 月 20 日报道,中共中央、国务院对《河北雄 安新区规划纲要》作出批复,同意该纲要。
A.
B.
C.
D.
【单选题】How long was Alan Johnston kidnapped?
A.
Nearly 14 months.
B.
Nearly 4 weeks.
C.
Nearly 4 months.
【单选题】. — He speaks French because he once lived in France. —Really? How long _____ there?
A.
does he live
B.
was he living
C.
has he lived
D.
did he live
【单选题】I don’t know if ______ to Shanghai for holiday next month.
A.
does he go
B.
will he go
C.
he goes
D.
he will go -
【单选题】Little ________ about his own safety, though he was in great danger himself.
A.
does he care
B.
did he care
C.
he cares
D.
he cared
【单选题】Traditionally, a person is considered 'well' if he ______.
A.
does not have any unhealthy living habits
B.
does not have any physical handicaps
C.
is able to handle his daily routines
D.
is free from any kind of disease
【简答题】A.For nearly 14 years. B.For nearly 50 years. C.For nearly 40 years. D.For nearly 30 years.
【简答题】Little ________ about his own safety, though he was in great er himself. A.does he care B.did he care C.he cares D.he caredcared
【单选题】C51语言提供的合法制数据类型关键字是 ( )
A.
sfr
B.
BIT
C.
Char
D.
integer r
【单选题】----__________ he like singing? ----Yes, he __________.
A.
Does; does
B.
Is; is
C.
Does; like
D.
Do; do
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