皮皮学，免费搜题
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【简答题】
A．From the name of the horse first used to carry mails. B．From the name of the city where this service first started. C．From the name of the office along the road. D．From the name of the stopping places for messengers.
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皮皮学刷刷变学霸
举一反三
【单选题】n. (usu. pl) a plan or method used to achieve sth. often against an opponent
A.
thanks to
B.
unequaled
C.
reckon
D.
tactic
【简答题】成都海关是( )海关,双流机场海关是( )海关