Sea otter is a kind of

　　polar animals. They are

　　very valuable while there

　　are only about 1000

　　otters in the world.(3 lives

　　in China)

　　Sea otter not only has

　　the most closest fur ,

　　but also eat the largest

　　amount food in the world.

　　此ppt多媒體課件總共20頁，請(qǐng)往下拉點(diǎn)擊下方按鈕進(jìn)行下載。