急性前壁心肌梗死最常见的心律失常是
A．室性期前收缩和室性心动过速
B．房室交界区性
C．心房扑动
D．阵发性室上性心动过速
E．窦性停搏
参考答案：A
To their great fear，they found________in the heaviest snowfall they had ever had.[ ]
A．they were catching
B．themselves caught
C．they had caught
D．themselves catching
春秋时代红、黄两色已确定为宫廷建筑专用色。明代明确规定了红、黄两色的皇家专色。( )P112
