—______is this pair of glasses?        

—I think it is our ______. [ ]

A. Who; teacher                

B. Who; teacher's  

C. Whose; teachers'          

D. Whose; teacher's

同温同压下，等体积的两容器内分别充满和气体，下列对两容器中气体判断正确的是 [ ]

A．中子数相同

B．分子数相同

C．质子数相同

D．气体质量相同