用DPD滴定法测定水中游离氯和总氯中,配制重铬酸钾标准溶液时,所称取的重铬酸钾应在()℃烘干()h。
A.105,1
B.180,1
C.105,2
参考答案:C
During the ten—day vacation , they traveled to France ______their own expenses .
A. on
B. with
C.at
D. in
理脾汤功效与作用