A:将涂布器在酒精灯火焰上灼烧,直到烧红
B:取少量菌液滴加在培养基表面
C:将沾有少量酒精的涂布器在火焰上引燃待酒精燃尽后,冷却8~10 s再用
D:涂布时可转动培养皿,使涂布均匀
We can't play computer games ________ night.