题目

—_________ is your science teacher?—My science teacher is at home. A . When B . Who C . Where D . What 答案:C(2011?济源模拟)客车每小时比货车快10千米,现在两车同时从两地相向而行,相遇时,客车与货车所行的路程比是8:7,两车的速度各是多少?(用比例解答)
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