Yao Ming is 2.26 metres tall. It's very to find a bed big enough for him.
A:easy
B:important
C:difficult
D:interesting
右图是镁和氯两种元素的有关信息,则下列说法错误的是 ( )
显微镜序号
目镜
物镜
1
5×
40×
2
10×
3
15×
8×