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【单选题】
某质点作直线运动，速度随时间变化的关系的图象为如图所示，则对这个质点运动描述，下列说法中错误的是：（）A.
初速度为4m/s
B.
在4s末的瞬时速度为12m/s
C.
第3s内的位移为21m
D.
第6s内的位移与第2s的位移之差等于8m
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反馈参考答案：
举一反三
【判断题】Dual distribution refers to an alliance that allows customers to purchase products from two or more name-brand retailers at one store location.
A.
正确
B.
错误
【简答题】圆柱的体积是______的圆锥体积的3倍，所以圆锥体积的公式是______．
【简答题】Page 34 listening to longer conversation.
【单选题】Happy Food Co. , Ltd.Agent required for nationwide distribution.Some experience in food retail an advantage.Refrigerated van provided.Happy Food requires an agent to ______ .
A.
own a suitable vehicle for delivery.
B.
be a specialist in food distribution.
C.
deliver goods all over the country.
【单选题】A company provides its product to customers with and without intermediaries. This kind of distribution channel is called _______.
A.
direct distribution
B.
dual distribution
C.
intensive distribution
D.
indirect distribution
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