A:none
B:no one
C:someone
D:Anyone
根据句意及首字母或汉语提示完成单词
1. What t____ do you get up?
2. She usually eats b____ at seven o'clock.
3. There are ____(五十)books on the desk.
4. We go to school ____ (早)every day.
5. Tom is my____(最好的) friend.
如图所示,将易拉罐的顶部剪去,蒙上半透明纸,在罐底部开一个小孔,用它做小孔成像实验,观察物体,下列说法中错误的是 ( )
如图是研究“滑动摩擦力”的实验.