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【单选题】
目前的GSM 系统使用的调制？A.
FSK
B.
FM
C.
GMSK
D.
PM
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举一反三
【单选题】What did the UN and aid agencies do for the disease?
A.
They made more efforts to find more new cases.
B.
They tried to prevent the disease out of the capital.
C.
They held a public movement on hygiene information.
D.
They boosted the accuracy and promptness of their report.
【简答题】What did the UN call on nations to do about CO2 and other greenhouse gases in 1992?
【单选题】What did the UN call on nations to do about CO2 and other greenhouse gases in 1992?
A.
To sign a new climate treaty at Rio.
B.
To draft an agreement among UN nations.
C.
To force the United Sates to reduce its emissions.
D.
To limit the release of CO2 and other gases.
【单选题】What did the UN call on nations to do about CO and other greenhouse gases in 1992?
A.
to sign a new climate treaty at Rio
B.
to draft an agreement among nations
C.
to force the United States to reduce its emissions
D.
to cut the release of CO and other gases
【单选题】What did Belgrade ask the UN administrator to do?
A.
To cancel the appointment.
B.
To announce the appointment.
C.
To block the appointment.
D.
To approve the appointment.
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