决定药物起效快慢的主要因素是（）
A.生物利用度
B.血浆蛋白结合率
C.消除速率常数
D.剂量
E.吸收速度
参考答案：E
________, the boys were shouting and singing. [ ]
A. Happy and excited
B. Happily and excited
C. Happily and excitedly
D. Happy and excitedly
