题目内容:
Inwhatwaydowhalesdistinguishthemselvesfromotherlandmammals?
A.Theyhaveveryfewhairsontheirbodies. B.Theybeartheiryoungratherthanlayingeggs.
C.Theirlungsarefullofhotairandwater.
D.Theycanwalkontheirhindlegsonland.
参考答案:【答案仅供学习,请勿对照自行用药等】
答案解析: