重铬酸铵〔（NH₄)₂Cr₂O₇〕是一种受热易分解的盐。下列各组对重铬酸铵受热分解产物的判断符合实际的是（   ）

A．CrO₃+NH₃+H₂O

B．Cr₂O₃+NH₃+H₂O

C．CrO₃+N₂+H₂O

D．Cr₂O₃+N₂+H₂O

Always read the ___ on tile bottle carefully and take the right amount of medicine. [ ]

A. explanations

B. instructions

C. descriptions

D. introductions