如右图所示，能表示动物肌细胞内ATP含量与氧供给之间关系的曲线是（）
A.a
B.b
C.c
D.d
参考答案：B
Read and write the opposite words．写出划线单词意思相反的词。
1. The elephant is heavy. The cat is .
2. English is easy. Maths is .
3. We won the game. They .
4. Bob throws the ball and David it.
5. The bus goes slowly. The car goes .
踏跺
The elephant is heavy. The cat is . 
English is easy. Maths is . 
We won the game. They . 
Bob throws the ball and David it. 
The bus goes slowly. The car goes .