来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/05/14 06:15:36
根据图下提示,完成报告(English).
they have warm blood and drink mothers' milk, they also go to the surface of the water for breathing
for 15 minutes/ swim for 260 meters below the surface, they also can swim up to 32km per hou