Ⅲ度房室传导阻滞的心电图不可能出现为()
A.心房率快于心室律
B.QRS波外形正常
C.R-R间期相等
D.P-R延长
E.P-P间期相等
参考答案:D
—Come in, please.Make yourself at home.
—I'm glad you like it.
A.Thanks.You have a nice place here.
B.Oh, this picture is so beautiful!
C.Thanks.What nice food you've prepared!
D.OK.Let me look around your new house.
随着能源消耗的剧增,科学家们都在竭力发现、制造新的能源,世界各国政府也都纷纷投入到新能源的发掘之中。这说明
A.实践具有客观物质性
B.实践是认识发展的动力
C.实践是检验认识正确与否的唯一标准
D.实践是认识的目的