—No, I don't like sports. I often play ______ piano in my free time.
A:a; the
B:the; /
C:/; the
D:the; a
控制生物性状的最小单位叫( )
秦汉时设朝议制度,当国家面临重要事情及君王难断之事,皇帝便会召集群臣,商谈解决方案,结果一般由宰相领衔上奏,最终决断权归皇帝所有。这一制度( )