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51 Suppose Host A wants to send a large file to Host B. The path from Host A to Host B has three links, of rates R1= 500 kbps, R2= 2 Mbps, and R3= 1 Mbps.
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A.
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B.
10 日
C.
15 日
D.
30 日
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【单选题】关于庐山的描述错误的是( )
A.
庐山北濒长江东接鄱阳湖，是著名的世界文化景观遗产
B.
庐山风光奇秀险雄，素有“匡庐奇秀甲天下”的美誉
C.
庐山是一座集风景、文化、宗教、教育、政治于一体的千古名山
D.
这里林草茂密，特别是到了深秋季节，遍山枫叶经霜而红，绚丽多彩
【简答题】We
write you this letter,_________ the establishment of L/C. (advise)
【单选题】We write this letter to explore the possibilities of _____trade with you .
A.
development
B.
developing
C.
developed
D.
develop
【单选题】We write this letter to explore the possibilities of ______ trade with you.
A.
development
B.
developing
C.
developed
【单选题】We write this letter to explore the possibilities of _______trade with you.
A.
development
B.
developing
C.
developed
D.
developable
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