在探究“物体动能的大小与哪些因素有关”的实验中，实验装置如图所示．

获得“感动中国”人物的有：26年义务守护滇池环境的农民张正祥；割肝救子的暴走妈妈陈玉蓉；照顾残疾家人20多年的退休工人朱邦月；为留守儿童办学的女大学生李灵……这些材料表明（   ）
①不同的人扮演着不同的角色，承担着不同的责任     ②不言代价与回报地履行责任，是一种奉献精神

③承担责任，付出越多，得到的物质回报越多             ④担负社会责任，就是要牺牲自我

下列朗读节奏划分不正确的一项是（    ）

如图，点B在射线AE上，∠CAE=∠DAE，∠CBE=∠DBE．

求证：AC=AD．

 

根据表格内容，选择最佳答案。    How time flies! The 9th graders are going to graduate soon. We invite them to write about their school memories.
    Let's share some of them.             
—Ms. Rosen
Name: Brita
Favourite memory: Moving to this school last year and meeting new friends. Unpleasant memory: Being the “new girl”. Favourite teacher: Ms. Rosen. I like her interesting classes. Advice: School can be fun if you do your best.Name: Jay
Favourite memory: School trips. Singing competitions. Unpleasant memory: Project homework. Favourite teacher: Ms. Williams. She treats every student equally. Advice: Work hard and fun will come.Name: Rocky
Favourite memory: Meeting new friends. The weekends. Unpleasant memory: Tests. Favourite teacher: Mr. Taylor. He helps me with my lessons. Advice: Once you fall behind, keep trying till you catch up.Name: Angel
Favourite memory: Being with new people. Fun classes. Unpleasant memory: The loss of a new watch. Favourite teacher: Ms. Rosen. She helped me through hard times. Advice: Hard work brings success.