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【单选题】
光纤的偏振保持思路是：A.
增加两个偏振态的差别，使其不易耦合
B.
提高光纤的圆度，使x、y方向的折射率尽可能一致
C.
增加光纤的椭圆度
D.
增加光纤的x、y应变差异
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【单选题】Section B Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you ...
A.
Whether we can develop social lies on the Internet.
B.
Whether a deleted photo is immediately removed from the web.
C.
Whether our blogs can be renewed daily.
D.
Whether we can set up our own websites.
【简答题】保证点到点可靠的数据传输是 OSI 参考模型中的____________,提供可靠的端到端服务是 OSI 参考模型中的________。
【简答题】1 Fill in the blanks with words or phrases from the box below. Change the form where necessary. A. accomplish B. self-sufficient C. utility D. agent E. whatsoever F.system G. adjustm...
【简答题】请从A-P的单词中选出适当的填空1-14。只填相应的字母代号,字母大写。 A. accomplish B. self-sufficient C. utilities D. agent E. whatsoever F. sysytem G. adjustment H. organic I. slow down J. set about K. consist of ...
【单选题】38 What does Akins do?
A.
She is a soldier.
B.
She is an accountant
C.
She is a saleswoman.
D.
She is a road sweeper.
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