题目

阅读理解 Many high school students consider a college educationuseless. Therefore, they choose not to go to college. If you're one of them,think again. Here are some reasons why you should go to college and receive agood education there. Schools and universities are the first sources of knowledge.We take that knowledge later on to build our careers after graduation. Moreknowledge will be gained after you start working, but without an education,that job will not be within easy reach. Knowledge leads to knowledge. While limited within the walls of the educationalinstitutions, we openly explo某研究小组探究避光条件下生长素浓度对燕麦胚芽鞘生长的影响。若干胚芽鞘去顶静置一段时间后，将含有不同浓度生长素的琼脂块分别放置在不同的去顶胚芽鞘一侧（如左图），一段时间后测量并记录弯曲度（α）。下图中能正确表示其实验结果的曲线是（ ）