According to the passage, which of the following statements is TRUE?
A.Different aspects(方面) of an urban environment, such as the crowded streets, can lead to an increase in self-control.
B.Small changes in urban design cannot reduce the negative side effects of city life.
C.For the first time in history, the earth's population is more urban than rural.
D.A walk down a busy city street will improve brain performance.
第6题
分批培养时,细菌首先经历一个适应期,此期间细胞处于代谢活动的低潮,所以细胞数目并不增加。( )
第8题
A.在pH环境中,微生物最能分泌代谢产物
B.在该pH环境下,微生物消耗最少,生命活动几乎处于停止状态
C.在该pH环境下,微生物代谢最旺盛,繁殖速度最快
D.微生物细胞内部的平均pH值
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!