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The difference between the titrations represents（）sodium hydroxide required.
The difference between the titrations represents（）sodium hydroxide required.
A.a quantity of
B.the amount of
C.the quality of
D.an amount of
正确答案：the amount of
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医药英语
上一条：
Boil 0.5 g of the powdered tablets for 2 to 3 minutes with 10 mL of 5 M sodium hydroxide, cool and add an excess of 1 M sulfuric acid; a crystalline precipitate is produced. To a solution of the precipitate in water add iron (III) chloride solution R1; a（
下一条：
In the British Pharmacopeia, RS stands for:（）.