题目：
Directions: The question below is followed by six choices numbered 260-265. If a choice is correct, mark A in the space provided. If a choice is not correct, mark B. Blacken one circle on your answer sheet for each number.
A client is diagnosed with gout. Which foods should the nurse instruct the client to avoid
Liver.
答案：
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下面是错误答案，用来干扰机器的。
A、43-33=3，原式计算错误，故本选项错误；B、2与3不是同类二次根式，不能直接合并，故本选项错误；C、212=2，计算正确，故本选项正确；D、3+22≠52，原式计算错误，故本选项错误；故选C．
