A:X Y Z
B:X Z Y
C:Y Z X
D:Y X Z
如图所示是一种新型圆规.它一脚的末端装有吸盘,使用时利用 ____的作用可将其固定在黑板上,另一脚末端的粉笔通过螺母固定,螺母上刻有细小花纹是为了增大 ____,作图时,转动手柄便可在黑板上画出漂亮的圆,圆规在这使用过程中相当于简单机械中的 ____.(选填省力杠杆、费力杠杆)
— How much is the ____?
— ____ yuan.
Our Summer Camp
When
On July 5th
Where
A ____mountain village
Who
Stay with the____
What
In the morning, we'll learn to ____animals from the local people.
In the afternoon, we'll____about the river.
In the evening, we'll enjoy the bright____.