【简答题】Ben will be ___________ to Denmark tonight to attend his brother’s wedding.
【简答题】Ben will be ___________ his way to Denmark tonight to attend his brother’s wedding.
【简答题】Ben will be ___________ to Denmark tonight to attend his brother’s wedding. (选词填空:walk around;look down on;on his way; is of great importance; )
【单选题】莫尔法测定 的实验中,标定 溶液用的基准物是( )
D.
可以采用直接法配制准确浓度的标准溶液,不用标定