右心房肥大的心电图诊断包括()。
A.P波高尖
B.P波时限<0.11s
C.电轴右偏
D.P波电压>0.25mV
E.P波电压<0.25mV
参考答案:A, D
There's snow. We can't go out to play football .[ ]
A. so many
B. much too
C. too much
D. too many
函数y=log0.5(4x2-3x)的定义域是______.