Look, you can see many _________ in the pool. And here is some ________for you to keep them.
A：fish; suggestion
B：fishes; advices
C：fish; advice
D：fishes; suggestions
He school at 8 pm.
母爱就象一首田园诗，幽远纯净，和雅清淡；母爱就象一首深情的歌，婉转悠扬，轻吟浅唱。母爱就是儿女成长的殷殷期盼，母爱就是儿女病榻前的关切焦灼，母爱就是漂泊天涯的缕缕思念，母爱就是一生相伴的盈盈笑语。班里要开展“感受母爱”的综合性学习活动，语文老师希望每一位同学都用心做好以下几件事。
演绎推理“因为f′（x0）=0时，x0是f（x）的极值点．而对于函数f（x）=x3，f′（0）=0．所以0是函数f（x）=x3的极值点．”所得结论错误的原因是（ ）
A
