如图是用厚刻尺测量木块的长度,正确的测量图是( )
A:
B:
C:
D:
实验室中有一组镜头可供选择,要使被观察的物体放大400倍,应选择的镜头为( )①目镜10X ②物镜40X ③目镜5X ④物镜10X ⑤物镜25X
age
hair
eyes
body
grandfather
72
white
black
short
grandmother
73
big
father
40
small
fat
mother
38
long
thin
sister
9
brown
I
10