A:大脑皮层,下丘脑
B:下丘脑,大脑皮层
C:下丘脑,下丘脑
D:大脑皮层,大脑皮层
We have done much to protect the environment. So the river is getting than before.
读图,回答下题.
32÷2=____
78÷3=____
65÷5=____
26÷13=____
55÷11=____
52÷13=____
51÷17=____
38÷19=____
57÷19=____