一____珍珠 一____小路 一____清泉
一____水泡 一____青苔 一____金光
137
966
191
925
271
932
812
458
569
683
431
257
393
027
556
488
730
113
537
989
据此估计,该运动员三次投篮恰有两次命中的概率为( )
- I don't think students should use mobile phones at school.
- ______. They really have a bad influence on our study.
不能鉴别出某溶液的pH<7的实验方法是( )