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【单选题】
流行病学研究的观察法与实验法的根本区别在于A.
设立对照组
B.
不设立对照组
C.
是否人为控制研究的条件
D.
研究对象的选择
E.
统计学检验
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皮皮学刷刷变学霸
举一反三
【单选题】I _____my breakfast at 8, but_____ I lunch yet. .
A.
had, haven't had
B.
had, didn't have
C.
have had, didn't have
【简答题】Because I had a lump in my throat and a lot of sad thoughts on my mind that had little to do with anything a Nippon railways official might say.
【单选题】And secondly, because I had a lump in my throat and a lot of sad thoughts on my mind.
A.
metonymy
B.
metaphor
【简答题】And secondly, because I had a lump in my throat...(Para.1)
【单选题】I had a lump in my throat and a lot of sad thoughts on my mind.
A.
a feeling of cry
B.
a feeling of belonging
C.
a tendency to withdraw
D.
a tendency to overreact
【单选题】--- Why are you so ＿＿＿＿＿＿, Helen? ---I thought I had lost my purse, but I didn’t. I found it in my study!
A.
angry
B.
happy
C.
sad
D.
nervous
【单选题】某女,55岁。患冠心病室性早搏3年,症见心悸不安,气短乏力、动则加剧、胸部闷痛、失眠多梦,盗汗,神倦,懒言,医师处以参松养心胶囊,服后症状得到控制。此因该药除活血通络外,还能
A.
益气强心，清心安神
B.
益气复脉，养阴生津
C.
益气养阴，清心安神
D.
益气强心，养阴生津
E.
益气复脉，平肝安神
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