创造的根本特点是（）。
A.唯创必新
B.无中生有
C.异想天开
D.只破不立
参考答案：A
学校后勤社会化的特点包括（）
A.服务性
B.教育性
C.集团化
D.市场化
E.规范化
The figure above represents a rectangular parking lot that is 30 meters by 40 meters and an attached semicircular driveway that has an outer radius of 20 meters and an inner radius of 10 meters. If the shaded region is not included, what is the area, in square meters, of the lot and driveway
