初始数据录入时在综合本位币界面下可以录入初始数据。
参考答案：对
— Do you regret________ up your opinion that every child should take part in service learning?
— No.On the contrary, I think it is very necessary. [ ]
A. bringing
B. to bring
C. to be brought
D. being brought
二人法做心肺复苏法时，胸外心脏按压与口对口呼吸法之比为（）。
A、1：5
B、5：1
C、15：2
