春联是春节的符号，最能体现春节的喜庆气氛。下面是两副蛇年的春联，请分别对出其上联或下联。(4分)
上联：龙腾广宇江山丽
下联：________________________________________________________________________
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上联：________________________________________________________________________
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下联：银蛇摇头迎来同乐年