现患病例—新发病例偏倚又称
A.Neyman偏倚B.选择偏倚C.Berkson偏倚D.信息偏倚E.混杂偏倚
参考答案:A
The stream________during the hot summer, but it is full of water in spring.
A.dries up
B.dries out
C.dries off
D.dries on
祛风湿,强筋骨的药物是()
A.狗脊
B.香加皮
C.千年健
D.鹿衔草
E.牛膝