在填写票据的出票日期时，下列各项中，将“10月20日”填写正确的是（）。
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纳税人通过邮政部门办理交寄手续，并向邮政部门索取收据作为申报凭据的，其纳税申报的日期为（）。
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
Which of the following is nearest to Peter Bentley’s view on the winged robot？
A. the winged robot could never really by
B. the winged robot did not have a motor
C. the winged robot should go through further evolution before it could fly
D. the robot could by if it were lighter
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