表1回弹值表有些防洪堤上爬满了爬山虎,这是好事还是坏事?我们来到白沙堤段进行了一系列的调查、实验。1.观察爬山虎又称“巴山虎”“常春藤”,葡萄科,高攀的落叶藤本。它的卷须前端具有吸盘,常攀援在墙或岩石上。防洪堤上的爬山虎根长在堤底的泥土里,主杆很粗壮,叶子也很茂盛 Table 1 Rebound Table Some creeks are covered with ivy, which is a good thing or a bad thing? We came to Baisha embankment conducted a series of investigations and experiments. 1. Observe the ivy, also known as “Bashan tiger” “ivy”, grape branch, climb the deciduous vine. Its front tendrils have suction cups, often climbing on the wall or rock. The creeper roots on the levee are long in the earth at the bottom of the dike, and the main bar is thick and the leaves are very lush