①属于按劳分配　
②受股票价格波动的影响　

③属于按生产要素分配　
④受公司经营状况的影响

   Do you still remember the disaster(灾难)several years ago? In Indonesia (印度尼西亚) thousands of people were killed by the tsunami(海啸) that washed people out to sea and pulled children out of their parents’ arms. “The weather was fine with no clouds .There was no warning and suddenly the sea water just hit the city. In some parts the water was as high as two meters.” a man in the city said. “Sadli, an official at the hospital, said many of the dead in the city were children under the age of ten.” “Maybe the children were being carried by their hold but they fell over in the water and couldn’t hold on to their children .All the dead children drawed.” said Sadli. Officials said hundreds of houses had been swept away the force (力量) of five –meter –high waves across Aceh, which lies on the northern tip (末端)of Sumatra Island . “Tens of people saw the rushing water and didn’t run to high ground .Instead, they kept watching it .Several of my workmates are missing.”  Lelana said by telephone.

乐山一中某同学做了个小实验，他用一根细绳绑住家中洗脸池活塞，用活塞塞住洗脸池的漏口，然后往池中放满水。等到水面平静了，他用手拉住绳子，迅速上提，把活塞拨出。他看见水在下渗的过程中形成了漩涡。水面的漩涡应该是（   ）