题目内容

中国药典中含芳伯氨基的药品大多采用下列哪种方法进行含量测定？

A. 氧化还原电位滴定法
B. 非水溶液中和法
C. 用永停法指示等当点的重氮化滴定法
D. 用电位法指示等当点的银量法
E. 用硫化银薄膜电极指示等当点的银量法

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滴定度是指()

A. 与1mL标准溶液相当的被测物的质量
B. 与1mL标准溶液相当的被测物的物质的量
C. 与1mL标准溶液相当的被测物的量
D. 与1mI标准溶液相当的被测物的摩尔数

Directions: There are 10 incomplete sentences in this part. For each sentence there are four choices marked A, B, C and D. Choose the one that best completes the sentence.1.Excuse me, can you give me a ______?Sure.

A. hand
B. help
C. favor
D. milk

Do you need help_______ your Maths homework?

A. to
B. from
C. with
D. for

You can’t go back______ your promise, for we are depending on you now.

A. on
B. at
C. in
D. with