题目

--           is the zoo from the bus stop?  -- It’s about 10 minutes’ walk . A. How long                                   B. How soon C. How far                                       D. How much 答案:C 丙酮是一种有机溶剂,可与水以任意体积比互溶,密度小于1g/mL,沸点约55℃,分离水和丙酮时最合适的仪器(或装置)是()     A.                            B.          C. D.
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