题目

I think there are only a few sports that are both ____ and ______. A entertaining…relaxed   B entertaining…relaxing C entertained…relaxed    D entertained…relaxing 答案：B欲除去FeCl2溶液中少量的FeCl3，可行的办法A.滴入KSCNB.通入氯气C.加入铁粉D.加入铜粉