药用芳酸一般为弱酸,其酸性()
A、教碳酸弱
B、较盐酸弱
C、较酚类强
D、较醇类强
E、较碳酸强
参考答案:B, C, D, E
Low – carbon lifestyle is of great benefit to improve the world environment. can be enjoyed from it until you have a deep understanding of it, however.
A.Something
B.Much
C.Few
D.Nothing
健康成人在安静状态下的呼吸频率为每分钟多少次()
A、16~20次
B、26~30次
C、30~36次
D、50~60次