If your jokes often find a ready echo in a person, you will learn through ______ that telling jokes to this person is fun, and you will try with greater efforts to be humorous in his presence.
A. classical conditioning
B. operant conditioning
C. neither A nor B
D. some other sorts of conditioning
下列关于药物稳定性加速试验的叙述中,正确的是
A. 试验温度为40±2℃
B. 进行加速试验的供试品要求三批,且为市售包装
C. 试验时间为1、2、3、6个月
D. 试验相对湿度为75%±5%
E. A、B、C、D均是
既能影响易水解药物的稳定性,又与药物氧化反应有密切关系的是
A. pH
B. 广义的酸碱催化
C. 溶剂
D. 离子强度
E. 空气
抗胆碱能药一般不用于下列哪种情况
A. 十二指肠球部溃疡
B. 胃溃疡
C. 急性胃肠炎
D. 急性胆囊炎