题目: 一段路,甲用8小时可以走完,乙用6小时可以走完;甲,乙两人的速度比是( )A.8:6B.16:18C.3:4 答案: (1÷8):(1÷6)=18:16=3:4;答:甲,乙两人的速度比是3:4.故选:C.
题型:选择题 (2009大连双基) Women _______ drink more than two cups of coffee a day have a greater chance of having heart disease than those ________ don’t.A.who ;不填B.不填 ; whoC.who ; whoD.不填; 不填 查看答案