Mr. Smith gave the tickets to all the students except _______ who had already seen the movie.
下列做法中能体现珍惜爱护生命的是( )
①骑车路过一个十字路口,看见红灯马上停止 ②放学回家的路上,遇到陌生人的诱骗,会自我保护 ③遇到落水者能够想方设法营救 ④外出游玩时遇到意外伤害能及时自救