pKa指()
A.药物99%解离时溶液的pH
B.药物90%解离时溶液的pH
C.药物50%解离时溶液的pH
D.药物全部解离时溶液的pH
E.药物不解离时溶液的pH
参考答案:C
Don't throw too much _______ anywhere.You should keep your room clean. [ ]
A.rubbish
B.books
C.clothes
D.bags
结膜炎患者结膜水肿的原因()
A.泪液进入结膜下
B.结膜血管渗出液进入结膜下
C.结膜下组织疏松
D.结膜下组织本身富含水分
E.结膜血管漏出液进入结膜下