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【单选题】
远距离单波长SDH系统常采用( )光纤。A.
G.651
B.
G.652
C.
G.653
D.
G.655
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反馈参考答案：
举一反三
【简答题】A．renewal B．substitution C．disposal D．alteration
【简答题】A．introduction B．innovation C．elimination D．alteration
【简答题】When authenticating an alteration on correction or the B/L, such authentication must consist of: 1) the name of the company the alteration. 2) their capacity (i. e. agent if the authentication ...
【单选题】When people started questioning his explanation,he had to______ more details. [ ]
A.
make of
B.
make for
C.
make up
D.
make into
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