散剂的吸湿性取决于原、辅料的CRH值，如A、B两种粉末的CRH值分别为30%和70%，则混合物的CRH值约为
A. l00%
B. 50%
C. 20%
D. 40%
E. 10%
The capsule has the following characteristics
A. It can cover the bad smell of the medicine.
B. Compared with tablets and pills, the bioavailability is higher.
C. It can protect drugs from moisture, oxygen and light.
D. Aqueous solution or oil solution of drug can be made into capsule.
E. Delay drug release
The factors influencing the material mixing operation in the preparation process are
A. Particle size distribution
B. stack density
C. Particle surface state
D. Refractive index
E. flowabilit
The reason for the uneven mixing of compound powder may be
A. The proportion of drugs varies greatly.
B. Large size difference of powders
C. Improper mixing method
D. Similar density of drugs
E. Insufficient mixing time
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