A:支票
B:外汇
C:信用卡
D:电子货币
把青蛙和小白鼠的细胞从25℃的室温中移至5℃的环境中,它们的需氧量的变化是( )
补全对话。
A: Hi, Chen Jie. ____
B: I'm fine, thank you.____
A: I'm not feeling well today.
B: ____
A: I have a headache.
B: I see. ____
A: Yes, I feel very tired.
B: You must go home and have a rest.
A: ____