-人教版[原创]senior2unit13基础点和配套练习（总复习用）I.高考必背 unit13
Sailor(n,海员，水手)；mariner(n,水手)；benefit(vt,使…受益，得益)；transport(vt/n,运输，运．．．II. Knowledge points
1.benefitn.III.practice:.( Word-spelling)
1. Life in the oceans from (变动、变化) the tiniest plankton (一直，始终) up to giants like sharks and whales.
2. The way the water (分子) is formed gives water its (独特的性

1). 利益,好处;优势[U][C]．．．
The new hospital will be a great benefit to the town.
新建成的医院将给全城带来莫大好处。．．．