高钾血症的心电图改变最不可能是 ( )
A．T波高而尖
B．QT间期延长
C．QRS曾宽
D．U波
E．PR间期延长
参考答案：D
Tom ____ two tests tomorrow morning. [ ]
A. had
B. will have
C. has had
D. was having
求1～100的和，可写成 for(s=0,i=1; 【8】 ;i++)s+=i; 的形式。
