研究抗生素的抑菌活性应选择细菌生长的哪一期( )
A．迟缓期B．对数增殖期C．稳定期D．衰亡期E．非对数增殖期
参考答案：B
You aren’t supposed to ask the boy to buy things for you. _______, he is too young.
A．In general
B．After all
C．To my surprise
D．To start with
* * 规定哪些行为可以被认为是自行脱党？
