单项选择题

A．A first-class letter.
B．Urgent mail.
C．A railway letter.
D．An airway packet.
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单项选择题
A．Microsoft did not take it seriously.B．Microsoft was opposed to the decision.C．Microsoft decided to do asE. U. required.D．Microsoft accepted the decision but did not take any measures.
A．Microsoft did not take it seriously.
B．Microsoft was opposed to the decision.
C．Microsoft decided to do asE. U. required.
D．Microsoft accepted the decision but did not take any measures.
单项选择题
A．Unregistered mail.B．Recorded delivery.C．Registered delivery.D．Urgent mail.
A．Unregistered mail.
B．Recorded delivery.
C．Registered delivery.
D．Urgent mail.
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