I have repaired much of the equipment. Would you please help me with _______within this week?

A．the other

B．the others

C．the rest

D．the remaining

由于外界刺激可诱发牙髓形成的物质是

A．继发性牙本质

B．修复性牙本质

C．以上都不对

D．原发性牙本质

E．功能性牙本质