I couldn't find Peter, did I know where he had gone. [ ]
A. either
B. nor
C. so
D. and
答案:B
设全集R,若集合A={x||x-2|≤3},B={x|y=lg(x-1)},则CR(A∩B)为[ ]
A.{x|1<x≤5}
B.{x|x≤-1或x>5}
C.{x|x≤1或x>5}
D.{x|-1≤x≤5}
高钾血症时心电图会出现哪种变化()。
A.心室纤颤
B.心房纤颤
C.T波低并有U波出现
D.T波高耸
E.ST段降低