题目内容

慢性泪囊炎从下泪点作泪道冲洗

A. 液体从鼻腔流出
B. 液体从下泪点流出
C. 液体从上泪点流出并伴脓液
D. 液体从原泪点流出

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1978年以来,中国经济对世界经济增长的平均贡献率超过20%。

A. 对
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A. unlikely
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