(1)原式=-8+1×9
=-8+9
=1,
(2)原式=3a8-a8
=(3-1)a8,
=2a8.
Bill Gates is __________ in the world.[ ]
A. one of the richest people
B. one of the richest person
C. one of richest people
D. each of the richest people
医疗机构需取得印鉴卡才可以购买的药品有
A.奥沙唑仑
B.咖啡因
C.地西泮
D.吗啡
E.麦角胺咖啡因