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        red is a symbol of warmth, it can sometimes make people feel uneasy or even frightened.
A.AsB.WhileC.IfD.Since
B
词义辨析。As正如,正像;While虽然,尽管;If是否,如果;Since自从,因为,由于。虽然红色是温暖的象征,有时它会让人感觉不舒服甚至害怕。所以选B。
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