为什么一些柱状仙人掌在他们的自然产地中，当夏天太阳位于顶端时，会将其柱状茎纵轴指向太阳？请看I～III的解释：
①以获得尽可能多的阳光
②让顶端的繁殖器官在上午和下午受热
③以减少柱状茎的升温
这些解释中的哪一句或哪几句是正确的？（）
A．eBay is a global phenomenon—the world’s largest garage sale, online shopping center, car dealer and auction site with 147 million registered users in 30 countries as of March 2005. You can find everything from encyclopedias to olives to snow boots to stereos to airplanes for sale. And if you stumble on it before the eBay overseers do, you might even find a human kidney or a virtual date.
eBay Basics
B．eBay is, first and foremost, an online auction site. You can browse through categories like Antiques, Boats, Clothing ＆ Accessories, Computers ＆ Networking, Jewelry ＆ Watches and Video Games. When you see something you like, you click on the auction title and view the details, including pictures, descriptions, payment options and shipping information.
C．If you place a bid on an item, you enter a contractual agreement to buy it if you win the auction.
小修是对船体和机舱设备进行（）。
①一般的检查和保养；②系统的检查和修理；③系统的维护保养和修理。
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{{B}}Is the Tie a Necessity {{/B}} Ties, or neckties, have been a symbol ’of politeness and elegance in Britain for centuries. But the casual Prime Minister Tony Blair has problems with them. Reports suggest that even the civil servants may stop wearing ties. So, are the famously formal British really going to abandon the neckties Maybe. Last week, the UK’s Cabinet Secretary Andrew Turnbull openly welcomed a tieless era. He hinted that civil servants would soon be free of the costliest 12 inches of fabric that most men ever buy in their lives. In fact, Blair showed this attitude when he had his first guests to a cocktail party. Many of them were celebrities (知名人士) without ties, which would have been unimaginable even in the recent past. For some more conservative British, the tie is a must for A. Tony Blair. B. Charles ll. C. Jim Callaghan. D. Andrew Turnbull. [单选题]对糖膏的调制叙述错误的是()。
A.糖粉不必过罗 B.糖膏的主要原料是糖粉蛋清 C.配方中应有醋精 D.搅好的糖膏要用湿布盖好 [判断题]加热炉故障熄火后,检修完成试点火时,技术人员应在炉体相关部位近距离观察。
A.正确 B.错误 [判断题]故意摆拍不属于图片造假。（）
我来回答: 提交
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