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【单选题】
PSTN (公用电话网)采用的交换方式是 ()A.
电路交换
B.
分组交换
C.
报文交换
D.
ATM交换
拍照语音搜题，微信中搜索"皮皮学"使用
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举一反三
【单选题】Most respondents of the Wall Street Journal poll______.
A.
are pessimistic about America's general track
B.
are optimistic about the country's outlook
C.
appreciate America's economic recovery
D.
feel that they couldn't afford a house
【简答题】A．As one of the greatest American scholars. B．As one of America's most ingenious inventors. C．As one of the founding fathers of the United States. D．As one of the most famous activists for human right...
【单选题】California, by some measures America's most【C1】______ state, is at the same time its most agricultural state【C2】______ total farm income. In 1988, the market value of【C3】______ products sold in Califo...
A.
civic
B.
municipal
C.
urban
D.
urbanized
【单选题】Christmas was a very ordinary day for most people in America' s southern colonies.
A.
Y
B.
N
C.
NG
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