Every student as well as teachers who_______ to visit the museum ______ asked to be at the school gate on time.

A．is; is

B．are; are

C．is; are

D．are; is

从根本上说，科学活动的生命力在于()。

A．继承前人创造的知识

B．继承他人创造的知识

C．在实践的基础上不断创新

D．科学家之间的合理分工