完形填空,阅读下面的短文，从短文后各题所给的选项中选出能填入空白处的最佳答案。
Bees live in a house that is called a hive. There are three kinds of bees: workers, drones (雄蜂) 1queens. Only one queen bee can live in each hive. If she is lost or dead, the other bees 2 their work.
Workers are very clever and busy. They all join together3 small rooms called cells of wax for their honey. Each worker bee does its own work. Some go out and collect honey from the flowers; 4 stay at home and work inside the hive. The cells5have six sides are made by worker bees. Did you ever look into a glass hive and see them while at work? It is 6to see how busy they always are. Before winter comes, all the drones are driven from the hive7 they don’t eat the honey they did not collect.
It is not safe 8 children to be too close to bees. Bees have painful stings they use in their defense (防御).
=50cm，则这个三角尺的面积与它在墙上所形成影子图形的面积之比是____。
