题目

You might be reading this article and saying, Hey, that sounds just like me! If so, we're glad you recognize that this happens to you．Now you can start taking steps to lessen your test anxiety．Here are some ways to do that: Ask for help．Talk to your mom or dad, your teacher, or your school guidance counselor．Just talking to someone about test anxiety can make you feel better．Describe what happens to you when you're taking a test and these people can help you figure out some solutions．For instance, learning study skills can boost your test-day confidence． Be prepared．Pay19．某同学用以下步骤和方法来测算物理课本内每张纸的厚度：①将从封面开始的10页纸叠紧②用刻度尺量出这叠纸的厚度为L1③算出每张纸的而厚度d=$\frac{L}{5}$．该同学以上做法中的错误是：（1）认为封面与内页厚度相同（2）选用页数太少，不便测量．