某药口服后只有少部分进入体内循环，较确切的表述是（）
A.生物利用度低
B.吸收少
C.效价低
D.蛋白结合率低
E.排泄快
参考答案：A
－David has made up his mind to continue with his studies.
－_______ and _______.
A．So he has; so have I
B．So has he; so have I
C．So he has; so I have
D．So has he; so I have
鉴定棉花品种纯度应根据哪些主要性状？
