如图所示，某人用力F推着A、B两个物体在水平面上做匀速直线运动，下列说法正确的是

题干

如图所示，某人用力F推着A、B两个物体在水平面上做匀速直线运动，下列说法正确的是（）

A：人对B的水平推力与B对人的作用力是一对平衡力

B：B受到的重力与地面对B的支持力是一对平衡力

C：人对B的水平推力与地面对B的摩擦力是一对平衡力

D：A受到的重力与A对B的压力是一对相互作用力

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C

This summer, Mary, Tom, Alan are going to have an ideal vacation .
The followings are their plans for the coming vacation .

	Mary	Tom	Alan
Where ?	The Great Wall	Spain	Canada
When?	The first week in June	The last day of the May	June, Monday 18^th
Who ?	His parents	His best friends	His cousin
What ?	Going hiking , Going sightseeing, Visiting some famous places in Beijing, Going shopping	Going sightseeing Going shopping Going camping Watching bull(牛)-fight	Spending time in the countryside , Renting videos at night , Going fishing , Going hiking, Sleeping a lot
How long?	About one month	Only two weeks	Until September
Transportation	By plane and by bus	By boat and by plane	By plane and by train