视觉所感受到的是景物的（）。
A.形状和颜色
B.形状和亮度
C.位置和亮度
D.亮度和颜色
参考答案：A
产后2周子宫的重量约为多少g（）
A.50
B.100
C.300
D.500
E.1000
The meeting was ______ over by the mayor of the city.
A. presumed B. proposed C. presented D. presided
