What has NASA planned to do？
A. To make another 11-second hypersonic night at 10 times the speed of the sound．
B. To make three more Hyper X experiments．
C. To retest the aircraft that is left．
D. To make the aircraft fly higher and longer．
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支付结算包括票据结算和非票据结算两类。非票据结算包括（）等结算方式。
Many professorS like to teach in this university partly because here______
Paragraph 5_________
Atmospheric Scientists
B. The Calculations Made at the Berlin Workshop
C. The Previous Calculations of the Effect of Aerosols
D. The Scientists'Agreement
E. The Authoritative Conclusion
F. Greenhouse Gases
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