标准溶液的配制只能用分析天平准确称量，直接配制。
参考答案：错
解析：标准溶液可以直接配制，也可以用标定法配制。
There are _____ products to be sold in the factory store. Which is not correct in the following? [ ]
A. a large number of
B. quantities of
C. a large amount of
D. a great many
在糖原合成中活化葡萄糖的载体是
A．ADP
B．GDP
C．CDP
D．UDP
