盐酸麻黄碱性质稳定，遇空气、热和

A．弱氧化剂均不易破坏

B．铁离子均不易破坏

C．铜离子均不易破坏

D．阳光均不易破坏

E．锌离子均不易破坏

Nowadays everyone is responsible for________a harmonious society in China. [ ]

A. making up  

B. taking up

C. opening up  

D. building up