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【多选题】
SDH自愈保护的方式主要有（）。A.
2纤单向通道倒换环
B.
2纤单向复用段倒换环
C.
4纤双向复用段倒换环
D.
2纤双向复用段倒换环
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反馈参考答案：
举一反三
【单选题】In C language, a ______ is a series of characters enclosed in double quotes.
A.
matrix
B.
string
C.
program
D.
stream
【单选题】In the passage the writer mainly talks about ______.
A.
the wonders of travel
B.
her growth from an innocent child to a learned woman
C.
the benefits of reading
D.
the difference between childhood dreams and life's realities
【简答题】建立一个“ ”是创意思维的基础。
【简答题】激光束的速度为()米/秒。
【单选题】Which of the following statements is correct concerning quotes in news and feature articles?
A.
Quotes are OK, but they do not add much to articles.
B.
Reporters should quote everything that their sources say in their articles.
C.
Reporters should use quotes to help readers “get to know” the people in the article and to add authenticity.
D.
None of the above.
【单选题】The writer quotes what Ian Whitworth, marketing director of staging connections says in order to _______
A.
distract visitors' undivided attention
B.
emphasize the importance of stand design
C.
justify one advantage of exhibition over other more traditional communication techniques
D.
outline the weakness of exhibition
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