病窦综合征合并房颤不易复律,心率过慢应考虑()
A.给予普鲁卡因胺
B.口服阿托品
C.安装起搏器
D.应用普罗帕酮
E.给予索他洛尔
参考答案:C
Words don’t have the power to hurt you, _______ the person who said them means a lot to you.
A.if
B.unless
C.until
D.whether
电力市场的主体具备的特征?