题目

It’s common to see food delivery workers riding electric bikes in a hurry through big cities in China. Some of them even risk 【1】 (run) red lights to deliver their meals in time. However, such careless behavior often causes serious problems.The reason for the rise of such a careless behavior is that there is 【2】large demand for food delivery workers, and many companies offer high salaries 【3】 (attract) new workers.In fact, food delivery workers are often under high 【4】 (press) from their employers. They face company fines for delivering food late. Moreover, the more orders th（2009•泉州）如图所示，一棵大树在一次强烈的地震中于C处折断倒下，树顶落在地面B处，测得B处与树的底端A相距25米，∠ABC=24度．（1）求大树折断倒下部分BC的长度；（精确到1米）（2）问大树在折断之前高多少米？（精确到1米）