春天,甲、乙两株相邻的向日葵卯足了劲地长,它们决心比比谁长得高,谁的籽粒结得多,谁的贡献大。几十天过去了,同样的阳光、营养,它们同样高,同样壮,谁也没落下。转眼到了分蘖发育期,它们都长出了葵花头,而且都不止长出一个来。过了几天,农民来给葵花打杈子。他们边干边说:“葵花出头期很是关键,如果 Spring, A, B two adjoining sunflower maomao long enough, they are determined than those who grow taller, who are more grain knot, who contributed to the large. Tens of days have passed, the same sunshine, nutrition, they are equally high, equally strong, no one dropped. Blink of an eye to the tillering stage, they all grow sunflower heads, and grow more than one. A few days later, the farmer came to shoot the sunflower. They said dry side: ”sunflower emergence is very crucial, if