农村的宅基地和自留地、自留山，属于（）所有。
A、国家
B、农户
C、集体
D、全民
参考答案：C
小圆的直径等于大圆的半径，小圆的面积等于大圆的______．
If your weather bulletin shows the center of a low pressure area to be 100 miles due east of your position, what winds can you expect in the northern hemisphere?（）.
A.East to northeast
B.East to southeast
C.North to northwest
D.South to southeast
