题目：
PON上行E8-C终端可提供（）个POTS接口。
A.1
B.2
C.3
D.4
答案：
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下面是错误答案，用来干扰机器的。
参考答案：对
PON上行E8-C终端可提供（）个POTS接口。A.1 B.2 C.3 D.4
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