China has been preparing to send some space laboratories into ____ space for its plane to build ____ space

station in 2020. [ ]

A. the; a

B. /; the

C. /; a

D. the; the

上市公司股东申请发行可交换公司债券的，应当向( )申请。

A．上市公司

B．中国证监会

C．证券交易所

D．证券业协会