问题
单项选择题
在同一导联上室早形态不同,且配对间期不等时称为( )
A.偶发室早
B.插入型室早
C.频发室早
D.RonT室早
E.多源性室早
答案
参考答案:E
在同一导联上室早形态不同,且配对间期不等时称为( )
A.偶发室早
B.插入型室早
C.频发室早
D.RonT室早
E.多源性室早
参考答案:E
Passage One
According to the man, why shouldn’t people be worried about climbing onto an elephant
A.Because elephants are mild animals.
B.Because elephants are trained to carry goods.
C.Because people have designed safe ways for the climbing.
D.Because people will be aided by professional assistants.