下列关于公司债券上市交易的条件不正确的是( )。
A．公司债券的期限为1年以上
B．公司债券必须分期付息
C．公司债券实际发行额不少于人民币5000万元
D．公司申请其债券上市时仍符合法定的公司债券发行条件
参考答案：B
解析：本题考《证券法》第51条规定的内容，公司申请其公司债券上市交易必须符合以下条件：①公司债券的期限为一年以上；②公司债券实际发行额不少于人民币五千万元；③公司申请其债券上市时仍符合法定的公司债券发行条件。
Astronauts’ meals have come a long way from the free-dried powders and semi—liquid pastes of decades ago，now US scientists want to grow vegetables in mini—greenhouses on the moon． Scientists say they are looking forward to a time when residents of future lunar or even Martian outsteps will be able to dine on fresh vegetables．Paragon Space Development Corporation has unveiled what it called the first step toward growing flowers——and eventually food on the moon． This is a sealed greenhouse that looks like a bell jar encased in a 46-cm triangular aluminiumframe．It is designed to safely land a laboratory plant on the lunar surface，and protect it while it grows． The miniature greenhouse is to be launched into space by Odyssey Moon Ltd, a participant in the Google Lunar X Prize. This competition offers $21 million to any entrant who can launch, land and operate a rover on the lunar surface. Paragon officials say future testing of the “Lunar Oasis” will be driven by Odyssey’s flight Schedule, which will not happen until 2012 at the earliest． When it does lift off the greenhouse will contain the seeds of Brassica, a hardy plant related to Brussels sprouts and cabbage. Because Brassica goes from seed to flower in just 14 days, it can complete its life cycle in a single lunar night. “Colonizing the Moon or Mars seems so far away，but it is important that we do this research now. ”Paragon president Jane Poynter said． “It takes a long time to get a lot of research, and to get integrated, reliable efficient systems before colonists move in. ”she said． 小题1:The article is written mainly to__________．
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in space