我爸爸每年都要在院子里种植多种蔬菜。靠墙根种上丝瓜,并从三楼系下多条绳子,让丝瓜秧顺绳子向上攀爬。过了几天,丝瓜苗长出来了,而且日益茁壮。以后丝瓜秧慢慢爬上了楼顶,满墙浓绿的瓜叶中点缀着许多金灿灿的小黄花,如同大景幕,美景可人。为什么丝瓜秧会爬得老高呢?原来全靠它的须。丝瓜秧在幼秧阶段,只长几片叶子不长须。随着瓜秧子成长,它的头部每长出一片叶子,同时与叶子并列长出一丛须。每一丛须条数量不等,多则6条,少则2条,4条居 My father grows many kinds of vegetables in the yard every year. Rely on the wall root loofah, and from the third floor under the number of ropes, so loofah seedlings along the rope climbing up. A few days later, loofah seedlings grew out and grew stronger. After the loofah seedlings slowly climbed the roof, covered with thick green leaves melon decorated with many golden yellow flowers, as the big screen, pleasant scenery. Why loofah seedlings will climb the old high? The original thanks to its beard. Loofah seedlings in the young seedlings stage, only a few pieces of leaves are not long to be. As the melon seed grows, it grows a leaf every time its head grows, while growing a bundle with the leaves. The number of each bundle varies, as many as 6, as few as 2, 4 Habitat