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【多选题】
OSPF的区域有哪几种类型?( )A.
骨干区域(area 0)
B.
基本区域
C.
末梢区域（stub）
D.
完全末梢区域（totally stubby）
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反馈参考答案：
举一反三
【单选题】Dr.Smith is _______ in his research and does not know anything about politics.
A.
shut
B.
typed
C.
defeated
D.
absorbed
【简答题】一般情况下，水域布设取样断面应设置在拟建排污口上游（ ）处。
【简答题】He would ________ it that his son took a livelier interest in politics. A) see into B) see through C) see about D) see to
【单选题】(As far as) I am concerned, his politics (are) rather conservative (compared) with other (politicians).
A.
As far as
B.
are
C.
compared
D.
politicians
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