题目内容

承载式车身车厢变形小,噪声和振动小,但高速行驶稳定性差。()

A. 对
B. 错

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发出波长为5460A的绿光入射到宽度为0.237mm的单缝上,缝后放一个焦距为40cm 的透镜。试求在焦平面上出现的衍射条纹中,中央明纹的线宽度。又若光源中有波长为5770A的黄光。问两光第一级明纹之间距离是否7.85×10-5m,直接回答“是”或“否”。

平行白光垂直垂照射狭缝,观察到夫琅和费衍射图样中某以波长的第三级明纹与波长为600nm的第二级明纹重合,求这某一波长的数值是否为4285.7A.直接回答“是”或“否”。

完形补文(请将正确答案的完整形式拼写在空格处,注意大小写)Building success from the ashes of failureThere are several key abilities (able)that allow successful people to fail forward instead of __1__ (take) each setback personally. First, successful people don't blame __2__ (they) when they fail. They take __3__ (responsible) for each setback, but they don't take the failure personally. Second, successful people don't define themselves by individual __4__ (fail). They recognize that each setback is a small part of the whole. Third, achievers are willing to vary their __5__ (approach) to problems. That's important in every walk of life. If one approach doesn't work for you, if it brings __6__ (repeat) failure, then try something else. To fail forward, you must do what __7__ (work) for you, not __8__ (necessary) what works for other people. Finally, successful people are resilient. They don't let one error keep them down. They learn from their mistakes and move on.These points form a firm foundation for dealing with failure in all parts of life, __9__ (include) personal finance. As you pay off your debt, as you learn to invest, as you cut your spending, accept that some failure is inevitable. But you are not your mistakes. Own them, learn from them, and move on. And remember: Good habits keep small mistakes __10__ (manage).

光在折射率为n的介质中传播的几何距离为x则光程为( )。

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