However, scientists are delighted by the discovery, because the engineers were all very educated people

and scientists feel they can ______ what they described.[ ]

A. rely on  

B. deal with

C. write down  

D. pass on

QRS波群方向交替变换的室速称（）

A.单形性室速

B.双向性室速

C.阵发性室速

D.心室夺获

E.室性融合波