由题意平面向量a=(0,1),b=(x,y),由a⊥b,
∴a?b=0
∴y=0
故答案为0
We will spend our summer holiday in Guilin, but we haven’t decided______________.
A.what to buy
B.where to go
C.how to go
D.which to choose
有可能引起高钾血症的是
A.卡托普利B.双嘧达莫(潘生丁)C.低分子肝素D.甲泼尼龙(甲基强的松龙)E.呋塞米(速尿)