A:Al3+——铝离子
B:2K——2个钾元素
C:F2——2个氟原子
D:2SO3——3个二氧化硫分子
隋朝杨尚希上奏日:“当今郡县,倍多于古,或地无百里,数县并置,或户不满千,二郡分领.具僚以众,资费日多;吏卒人倍,租调岁减。…所谓民少官多,十羊九牧。”据此,杨尚希最有可能提出的建议是( )
I have just had my lunch. I _____ it at home.
When and where we'll hold the meeting ________ not been decided yet.