皮皮学，免费搜题
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【单选题】
最适合于1.55um工作波长高速率多信道系统工作的是哪个型号的光纤?A.
G.652光纤
B.
G.653光纤
C.
G.654光纤
D.
G.655光纤
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举一反三
【判断题】If the shipment date is “on or about May 20” , then the goods must be shippedbefore that date.
A.
正确
B.
错误
【单选题】If the shipment date is "first half of August" in the L/C,then the goods must be shipped( ).
A.
before August 15th
B.
after August 15th
C.
August 1st to 15th,all dates inclusive
D.
August 1st to 15th,exchding August 1st
【判断题】If the shipment date is “on or about May 20”, then the goods must be shipped before that date.（ ）
A.
正确
B.
错误
【判断题】If the shipment date is “on or about May 20”, then the goods must be shipped before that date.
A.
正确
B.
错误
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