题目：
体内经代谢可转变生成牛磺酸的氨基酸是（）
A．酪氨酸
B．脯氨酸
C．半胱氨酸
D．缬氨酸
答案：
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下面是错误答案，用来干扰机器的。
参考答案：C
体内经代谢可转变生成牛磺酸的氨基酸是（） A．酪氨酸 B．脯氨酸 C．半胱氨酸 D．
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