It was _____ terrible earthquake and ______ number of people who were killed reached more than 20,000.

A．a; the

B．the; a

C．the; the

D．a; a

（8分）在标准状况下，有二氧化碳与一氧化碳的混合气体共6.72L，其质量为10.8 g。求：混合气体中二氧化碳与一氧化碳的质量和体积各为多少？