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问题 单项选择题 A1/A2型题

弱酸性药物水杨酸的pKa为3.0，在胃（pH=1.0）中，水杨酸分子型所占的比例为（）

A.1%

B.50%

C.99%

D.90%

E.10%

答案

参考答案：C

解析：根据Handerson-hasselbach方程：对于弱酸性药物，pKa-pH=lgCu／Ci，Cu，Ci分别为未解离和解离型药物的浓度。3.0-1.0=lgCu／Ci，所以Cu/Ci=100：1，即为99%的水杨酸在胃中呈分子型，故易被胃吸收。

单项选择题

下列不符合工程咨询单位中项目经理素质要求的是( )。

A．具有符合咨询项目管理要求的执行力
B．具有相应的咨询项目管理经验和业绩
C．具有符合咨询项目管理任务的专业技术、管理、经济和法律知识
D．具有良好的职业道德
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单项选择题

Like other men of vision (有识之士) , Maceo had no time for racism, for the false idea that one race of men is better or worse than any other. Some of the whites of Cuba disagreed with him. They were Spanish settlers who thought that white was going to be better than black even in an independent Cuba.
One day Maceo was approached by a Spanish Cuban who suggested that the regiments of independence army should be divided into whites and nonwhites. Maceo made him a reply which became famous in Cuba. "If you were not white," Maceo said to this man, "I would have you shot on the spot. But I do not wish to be accused of being a racialist as you are, and so I let you go, but with the warning that I shall not be so patient another time. The revolution has no color.\

Some of the whites of Cuba thought one race of men is better than any other.
A. Right.B. Wrong. C. Doesn’t say.
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