引起猝死最常见的心,律失常是()
A．心房颤动
B．心房扑动
C．心室颤动
D．阵发性室上性心动过速
E．频发性室性期前收缩
参考答案：C
---Mum, could you buy me a dress like this?
---Certainly, we can buy ______ one than this, but ______ this.
A．a better; better than
B．a worse; as good as
C．a cheaper; as good as
D．a more important; good as
下列物质按熔点增高顺序排列，正确的是( )。
A．CO2→HCl→SiO2→Fe B．HCl→CO2→Fe→SiO2C．SiO2→Fe→HCl→CO2 D．CO2→HCl→Fe→SiO2
