第23题: [单项选择]中国药典规定紫外-可见分光光度计需定期进行校正,如何测定吸收度准确性() A. 用比色用氯化钴溶液检定 B. 用不着1%浓度的碘化钠溶液检定 C. 用比色用重铬酸钾溶液检定 D. 用重铬酸钾的硫酸溶液检定 E. 用比色用硫酸铜溶液检定 参考答案:D 答案解析:中国药典规定紫外-可见分光光度计需定期进行校正,用重铬酸钾的硫酸溶液检定,测定吸收度准确性。
第26题: [单项选择]{{B}} Questions 19 to 22 are based on the conversation you have just heard.{{/B}} A. The woman should stop buying clothes. B. The woman shouldn’t worry too much. C. The woman should go shopping less. D. The woman shouldn’t buy so many clothes. 参考答案:D 答案解析:[听力原文]
W: I’m having trouble making ends meet. It looks like I have to make another phone call to m