問題詳情
【題組】50 What happened in 1847 ?
(A) Postage stamps were in use in 90 different countries.
(B) It cost fifteen cents to mail a letter in the United States.
(C) Two different denominations of postage stamps were introduced in the US.
(D) The US Congress introduced the “Queen Victoria” stamp
參考答案
答案：C
難度：適中0.672727
統計：A(1),B(10),C(37),D(5),E(0)
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