【简答题】对孕妇进行访视、询问并记录她怀孕期间的吸烟情况,而后分析吸烟暴露与婴儿低出生体重的关系,这种研究的类型是()A、现场实验B、队列研究C、现况调查D、临床研究A.B.C.D.E. E
【单选题】对孕妇进行访视、询问并记录她怀孕期间的吸烟情况,而后分析吸烟暴露与婴儿低出生体重的关系,这种研究的类型是( )
【单选题】This passage is most probably taken from an article entitled '____' .
D.
Traps in Building Construction
【单选题】This passage is most probably taken from .
【单选题】The author of this passage is most probably ______.
【单选题】This passage is most probably authored by ______.
A.
the Conference Board staff
B.
a newspaper business writer
C.
a consumer representative
D.
an employment researcher
【单选题】This passage is most probably taken from an article entitled' ______'.
D.
Traps in Building Conservation
【单选题】对孕妇进行访视、询问并记录她怀孕期间的吸烟情况,而后分析吸烟暴露与婴儿低出生体重的关系,这种研究的类型是( )
【单选题】对怀头胎的孕妇进行访视、询问并记录她在怀孕期间的吸烟状况,而后研究分析吸烟史与婴儿低出生体重的联系,这属于