疫苗或转群时减少应激一般采取（）
A、加料
B、加水
C、喂电解多维
D、微量元素
参考答案：C
Helen always helps her mother even though going to school _____ most of her day. [ ]
A. takes up
B. makes up
C. saves up
D. puts up
绿卡通卡内人民币储种主要包括（）。
A．整存整取
B．零存整取
C．通知存款
D．定活两便
