A:How can I have
B:How would I have
C:Why should I have
D:Why must I have
构成染色体的物质主要是( )
孔子要求作为一个仁者,在消极方面要“己所不欲,勿施于人”,在积极方面要“己欲立而立人,己欲达而达人”。这是( )