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

根据《契税暂行条例》规定，下列各项中，属于契税征税对象的有( )。

A．房屋买卖

B．国有土地使用权出让

C．房屋赠与

D．农村集体土地承包经营权转移