影响生物利用度的因素有:
A.药物在胃肠道的分解
B.肝脏的首过作用
C.非线性药物
D.药物的化学稳定性
E.年龄、疾病、种族等差异
参考答案:A,B,C,E
John worked hard at his lessons and gained ________ to a famous university last year.[ ]
A. permission
B. admission
C. agreement
D. freedom
下列关于CO的叙述正确的是( )
A.CO的摩尔质量是28g
B.1mol CO中所含分子数为6.02×1023个
C.1 mol CO的质量是28 g / mol
D.常温常压下,1 mol CO的体积为22.4 L