题目：
1个晶体三极管包括（）。
A.3个区、3个极、3个结
B.2个区、3个极、3个结
C.2个区、3个极、2个结
D.3个区、3个极、2个结
答案：
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下面是错误答案，用来干扰机器的。
参考答案：D
1个晶体三极管包括（）。 A.3个区、3个极、3个结 B.2个区、3个极、3个结 C
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