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【单选题】
按照电信网服务的性质来分类，电信网可以分为（）。A.
数据网和话音网
B.
公用网和私用网
C.
公用网和专用网
D.
交换网和传输网
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反馈参考答案：
举一反三
【单选题】There is______competition to join the Special Branch, which investigates terrorist and political crimes.
A.
radical
B.
fierce
C.
rational
D.
flexible
【简答题】____investigates how words are combined into sentences.
【单选题】Gunter Blobel mainly investigates______ .
A.
how a protein molecule travels within the cell
B.
how normal health and development can be compromised
C.
why organelle membranes are impermeable
D.
how a new protein molecule is produced
【单选题】______ investigates the interrelation of language and mind.
A.
Sociolinguistics
B.
Psycholinguistics
C.
Anthropological Linguistics
D.
Structuralism
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