With the successful launch of Tiangong-I, which was ______ breakthrough in space field, China's space dream took a step closer to ______ reality.

A. a; /            B. the; a          C. a; the              D the; /

股息收入国解决国际重叠征税的主要措施是采用（）。

A.母子公司合并报税和间接抵免制

B.双税率制和折算制

C.间接抵免制和双税率制

D.母子公司合并报税和折算制