⑴ ____lack ⑵re____ ⑶wh____te
⑷blu____ ⑸____reen ⑹____ellow
骆驼和骆驼刺等沙漠动、植物表现出对____的适应.海豹的皮下脂肪是对____的适应,而旗形树的树冠是对____的适应.