题目

He is the tallest of all________. A. his classmates     B. his friends  C. his students    D. the students 答案：D在细菌生长过程中，细胞形态最多和活菌数最多的时期分别是（　　） A、调整期、稳定期B、衰亡期、对数期C、稳定期、对数期D、衰亡期、稳定期