下列物质与反应的分类正确的是 [ ]
A.纯碱、醋酸钠分别属于碱和盐
B.酒精属于氧化物
C.氯水和氨水都属于弱电解质
D.铝与强酸、强碱的反应都属于氧化还原反应
答案:D
The ______ boy was last seen ____ near the East Lake.
A.missing; playing
B.missing; play
C.missed; played
D.missed; to play
膳食指南的十条是什么?