厨房中的下列物质能形成水溶液的是（ ）
A．面粉
B．食用油
C．奶粉
D．白糖
A、面粉不溶于水，不能和水形成均一、稳定的混合物，即不能和水形成溶液，面粉溶于水后形成的是悬浊液，故A错误；
B、食用油不溶于水，不能和水形成均一、稳定的混合物，即不能和水形成溶液，食用油和水形成的混合物属于乳浊液，故B错误；
C、奶粉不溶于水，不能和水形成均一、稳定的混合物，即不能和水形成溶液，奶粉溶于水后形成的是悬浊液，故C错误；
D、白糖易溶于水，能和水形成均一、稳定的混合物，即能和水形成溶液，故D正确．
故选D．
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