—Much knowledge as well as many abilities _____ from our teachers.

—Yes.We should love and respect our teachers.[ ]

A. are learned  

B. is learned

C. learn  

D. learns

房间里有10个人，分别佩戴从1号到10号纪念章，任选3人记录其纪念章的号码，最小号码为5的概率是（）。

A．A

B．B

C．C

D．D