卡丁车
参考答案:31(9508.9000)
–Do you need any help, Lucy?
--Yes. The job is I could do myself.
A.less than
B.more than
C.no more than
D.not more than
恒温动物比变温动物更具有生存优势的原因在于()
A.恒温动物需要的食物少
B.恒温动物耗氧少
C.恒温动物需要的能量少
D.恒温动物更适应环境变化