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【单选题】
企业与企业之间的电子商务称为A.
B2B
B.
B2C
C.
C2C
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【简答题】网络适配器俗称（）
【单选题】6 things you do not know about Gregorian calendar1. The original goal of the Gregorian calendarwas to change the date of Easter.In 1582, when Pope Gregory XIII introduced his Gregorian calendar, Europ...
A.
To add extra days into February would make the calendar unreasonably long.
B.
Every year divisible by four contains leap days
C.
If a year is divisible by 100 and also divisible by 400, whether a leap day is added does not really matter.
D.
Lilius’ variation did resolve the lag created by Caesar’s earlier scheme
【单选题】经济件单边超过（）公分的应当计泡，邮件体积重量大于实际重量的按体积重量计收资费，经济件体积重量计算标准为长（CM）×宽（CM）×高（CM）÷6000。
A.
30
B.
60
C.
80
D.
100
【简答题】从折纸所用纸的形状来看,则多是( )形,其次是( )形,也有用三角形、菱形、五角形、六角形、八角形甚至是圆形的。
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