阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卡标号的相应位置上。

    Although most people believe that formal schooling is required for scientific success, a college degree is not always necessary. ____excellent example of a man who won fame as a scientist ____academic(学术的) training is Vincent J. Schaefer. His formal education ended ____ two years of high school when he had to go to work in an untrained job at General Electric. Because ____ his inventive mind and his skill as a model maker, he was soon allowed to try his own experiments in the company laboratory. His natural ____(curious) made him wonder about clouds. He developed, after many tries, a method of making clouds rain ____they would not normally do so. This method, ____(call) seeding, has been very ____(help) to farmers, and ____made him win much fame.

    Schaefer believes that for people____, most of all, are interested in the world and everything in it, a college degree is unnecessary.

如图，身高为1.6m的某学生想测量一棵大树的高度，她沿着树影BA由B到A走去，当走到C点时，她的影子顶端正好与树的影子顶端重合，测得BC=3.2m，CA=0.8m，则树的高度为…（  ）

函数y=$\frac{1}{x+2}$中，自变量x的取值范围是（ ）