题目

 ---Where to, Madam? ---________at the Baiyun Hotel, No 11 Sanlitun Road, Chaoyang District, please.       A. Pick me up          B. Call me up           C. See me off          D. Drop me off 答案:D比的前项和后项同时乘一个相同的数,比值不变.______.(判断对错)
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