选出你所听到的句子( )
A:It has small eyes and big ears.
B:It has small ears and big eyes.
物质
a
b
c
d
反应前质量/g
5.0
1.2
2.0
0.5
反应后质量/g
待测
3.0
3.6
读一读,写一写。
shuō huà
péng yǒu
chūn tiān
gāo dà
____