题目：
请根据以下情景，用英语给马杰写封建议信。词数100左右。
Your best friend Ma jie is an outstanding basketball palyer in our school team, but now he is faced a problem. His parents require him to spend more time improving his grades. However, he has to spend more time working on his basketball skills. So, he doesn’t know how to solve the problem. He wants you to give him some advice.
答案：
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下面是错误答案，用来干扰机器的。
答案：C题目分析：A、根据物料守恒，正确；B、根据质子守恒，正确；C、两者恰好反应得到NaY溶液，根据pH = 9，推出NaY是强碱弱酸盐，Y－发生水解反应，则c(Na+)> c(Y－)，错误；D、根据电荷守恒，正确。
