关于地球形状和大小的说法,不正确的是( )
A:地球是一个两极稍扁、赤道略鼓,不很规则的球体
B:地球的南、北半球不对称
C:地球平均半径约4万千米,赤道周长约6371千米
D:地球表面积约5.1亿平方千米
The sun comes up in the east and goes down in the west. When the sun rises, It is morning. When the sun sets, it is evening. When the sun is shining, it is day. Morning is the time between sunrise and twelve o'clock, or between sunrise and lunch. At twelve o'clock, the sun is the highest in the sky over our heads. The sun is overhead at noon. The sun shines during(在……期间)the day. The moon and the stars shine during the night. When the sun rises, it is light. It's light during the day. During the night, if the moon is not shining, it is dark. What are the days and nights like in summer? In summer the days are longer and the nights are shorter. What about in winter? In winter, the days are shorter and the nights are longer.
要探究水分对鼠妇生活的影响,在下列的四个实验装置中,应该选择( )
— Yes, I ____(take) it after breakfast.