Most museums are just for looking. But today some of them have things for you to touch. The signs say, "________!"

A．Be touching

B．To touch

C．Do touch

D．No touch

布莱特设计的小组道德讨论包含以下哪些因素（）

A.课程要素

B.班级要素

C.教师要素

D.家长要素

E.实践要素