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同样的图案蜡染后却可得到不同的色纹.花鸟鱼虫几何图案映衬深蓝的底色蜡染显得古朴而神秘Different grains come from the same patterns. Flowers, birds, fish, insects and ____ on the cloth look ____

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Which one of the following is not the physical and chemical factors affecting the design of oral sustained and controlled release preparations.

A. stability
B. Water solubility
C. Partition coefficient
D. half-life
E. PKa

The half-life of the drug that is suitable for the preparation of sustained/controlled-release preparations is

A. <1 h
B. 2-8 h
C. 24-32 h
D. >48 h

The dosage of drug for a general preparation is 3 times a day, 100mg each time. Now you are plan to design a sustained-relese preparation, and take medicine once a day. What dosage should you choose?

A. 150mg
B. 200mg
C. 250mg
D. 300mg
E. 350mg

A drug is absorbed in stomach and small intestine, now we plan to deisgn a sustain-release preparation, how long is the proper interval to take medicine?

A. 6h
B. 12h
C. 18h
D. 24h
E. 36h

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