第22题: [单项选择]药物中重金属杂质是指() A. 在实验条件下耐高温的金属 B. Hg和Pb C. 在实验条件下能与硫代乙酰胺或硫化钠作用显色的金属 D. 比重大于5的金属 E. 能与金属配位剂反应的金属 参考答案:C 答案解析:《中国药典》中作为杂质的重金属是指在实验条件下能与硫代乙酰胺或硫化钠作用显色的金属盐类。
第25题: [单项选择]A. Tony is absolutely lazy. B. Tony always puts off doing things. C. Tony hates checking his homework. D. Tony always makes mistake in his work. 参考答案:C 答案解析:[解析] M:Tony is so careless.He never checks his homework. Q:What can we infer from this conver
第32题: [单项选择]下列试验不属于蛋白质和氨基酸的代谢试验是 A. CAMP试验 B. 吲哚试验 C. 硫化氢试验 D. 明胶液化试验 E. 尿素分解试验 参考答案:A 答案解析:[解析] CAMP试验用于鉴别B群链球菌,其产生的CAMP因子,可促进金黄色葡萄球菌的溶血能力,使其产生显著的协同溶血作用。
第33题: [单项选择]低压阀是指公称压力()MPa的阀门。 A. ≤1.0 B. ≤1.6 C. 1.0~3.0 D. 1.0~5.0 参考答案:B
A. showing the faulty item to the manufacturer B. explaining exactly what is wrong with the item C. saying firmly that the item is of poor quality D. asking politely to change the item 参考答案:B 答案解析:根据第四段第一句“Complaining is usually most effective...especially when the consumer can demonstrate what i