由南极洲乘船往北到北冰洋进行科学考察,考察队员对气温的感觉是( )
(____) No, I don't like winter.
(____) Which season do you like best, Lily?
(____) Winter. I can play with snow.
(____) So I like autumn best. It's always sunny and cool.
(____) What about you? Do you like winter, too?
(____) It's too cold.
已知f(x)为一次函数,且f(x)=x∫02fxdx+1,则∫-11f(x)dx=( )