单词：reeducations
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The space shuttle Discovery, mission STS-128, is in orbit right now. With some fascinating people on board. Pilot Kevin Ford became interested in flying when he was a kid and read the book Carrying the Fire, by Michael Collins, command module pilot o
Scientific American(八)月
Jana: So we have homework, tests, what about attendance? Should we require students to attend classes or? Sometimes people argue at university level it shouldn't be compulsory. Peter: I think you should attend some classes at least. You're going to u
原版英语对话1000个
Jana: So we have homework, tests, what about attendance? Should we require students to attend classes or? Sometimes people argue at university level it shouldn't be compulsory. Peter: I think you should attend some classes at least. You're going to u
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The space shuttle Discovery, mission STS-128, is in orbit right now. With some fascinating people on board. Pilot Kevin Ford became interested in flying when he was a kid and read the book Carrying the Fire, by Michael Collins, command module pilot
60秒科学