题目

A warm thought suddenly came to me _______ I might use the pocket money to buy some flowers for my mother's birthday. A . what B . which C . that D . whether 答案：C水中加入几滴花生油，充分振荡后，得到的是________液，澄清的石灰水中通入少量的二氧化碳，得到的是________液。