????:1????????:?????vx

2???????

3?????????100?????

4????????

5???????????

?12??18? (??????????? ??)???????,?“??”??18???

??18?16?13?????????????????,??19??????,??7??9?????????9???????????????10??7???????8?????????????????9??,?????7???????9???????9?????10????????????????6??????????7????????????????8?9??????,??8???????????9??????????10????????????11???????7???????8?????9?????????10???

??,???????,?18????????19????,????????????4.0??5.3????,??3.5???????4.8??,????????3.0??4.5???????????;????????????????????2.3??3.3?????;????????????1.8?????2.8??

?12??,???????????,??,????

????,????????????????????,?????????????;???????,????(AIS)?????,??,?,??????,??,????(??) ??????:???