The earth moves round the sun, and the moon goes round the earth. When our part（部分）of the earth turns to the sun, it is day, When our part of the earth turns away from the sun, it is night. The sun is much bigger than the moon. But sometimes the moon looks bigger than the sun, because it's much nearer to the earth. The sun is very bright. It gives a very strong light. The moon looks quite bright, too. But it doesn't give any light at all. The moon looks much bigger and brighter than the stars. But actually（事实上）, the stars are much bigger and brighter than the moon. They look smaller than the moon because they're much farther away from us.

大学生就业一直是人们关注的话题,近几年,每临毕业季，我们就会一次次的听到“史上最难就业季”之说，2016年我国高校毕业生达765万人，比去年又增加了16万人，就业形势依然严峻。面对这一形势,大学生选择职业时应该（    ）

①综合考虑自己的兴趣和实际能力等因素

②坚持理想与现实的辩证统一

③发挥主观能动性,找到待遇好的工作为止

④不断跳槽，努力实现自我价值