A:两种动物的耗氧量都减少
B:两种动物的耗氧量都增加
C:青蛙的耗氧量减少,小白鼠的耗氧增加
D:青蛙的耗氧量增加,小白鼠的耗氧减少
My parents want to go _____________ on vacation, they are so tired these days.