如图所示，水平地面上的物体A，在斜向上的拉力F的作用下，向右做

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问题多选题

如图所示，水平地面上的物体A，在斜向上的拉力F的作用下，向右做匀速运动，则下列说法中正确的是

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A．物体A可能只受到三个力的作用

B．物体A一定受到了四个力的作用

C．物体A受到的滑动摩擦力大小为Fcosθ

D．物体A对水平地面的压力的大小一定为Fsinθ

答案

阅读理解

读短文，完成下列各题，并给地图标上地点。

Hi! I'm Peter. This is my house. It's very beautiful. There is a park. It is north of my house. The school is

east of my house. I often walk to school. There is a gym in the south of my school. I often play badminton

there.

1. The park is _____________ of my house.

2. The school is _____________ of my house.

3. The gym is in the _____________ of my school.

选择题

明明在眼镜店内配制了凹透镜，说明他（　　）

A．视力正常

B．视力近视

C．视力远视

D．其他眼睛疾病