高血压的流行病学调查中,以下因素未确定与发病有关的是()
A.体重
B.遗传
C.钠盐
D.精神应激
E.膳食中的脂肪
参考答案:E
小题1:In China, primary school has more __________ (woman) teachers.
小题2:Chinese people all dress________ (they) in the best clothes when important festivals come.
小题3:The guide has collected the ______ (visit) ID cards since they arrived at this five-star hotel.
小题4:Her red dress makes her look much _____________ (pretty).
小题5:Cut the apple into _____________ (half). Then we can share them.
小题6:I am waiting for my turn ___________ (make) a wish at the table with my friends.
小题7:I look forward to________________ (dress) up as Monkey King.
小题8:Does this pair of glasses ______________ (match) my jeans?
小题9:Some students don’t know how to have _____________ (funny) at weekends.
小题10:The two children _____________ (agree) about everything and always argued.
设有关系模式R(B,C,M,T,A,G),根据语义有如下函数依赖集:F={B→C,(M,T)→B,(M,C)→T,(M,A)→T,(A,B)→G}。则关系模式R的候选码是()。