皮皮学,免费搜题
登录
logo - 刷刷题
搜题
【单选题】
When we think about happiness, we usually think of something extraordinary--and those pinnacles of sheer delight--and those pinnacles seem to get rarer the older we get. For a child, happiness has a magical quality. I remember making hide-outs in newly cut hay, playing cops and robbers in the woods, getting a speaking part in the school play. Of course, kids also experience lows, but their delight at such peaks of pleasure as winning a race or getting a new bike is unreserved. In the teen-age years the concept of happiness changes. Suddenly it's conditional on such things as excitement, love, popularity and whether that zit will clear up before prom night, I can still feel the agony of not being invited to a party that almost everyone else was going to. In adulthood the things that bring profound joy--birth, love, marriage--also bring responsibility and the risk of loss. Lover may not last, sex isn't always good, loved ones die. For adults, happiness is complicated. Psychologists tell us that to be happy we need a blend of enjoyable leisure time and satisfying work. I doubt that my great-grandmother, who raised 14 children and took in washing, had much of either. She did have a network of close friends and family, and maybe this is what fulfilled her. If she was happy with what she had, perhaps it was because she didn't expect life to be very different. We, on the other hand, with so many choices and such pressure to succeed in every area, have turned happiness into one more thing we 'gotta have.' We're so self-conscious about our 'right' to it that it's making us miserable. So we chase it and equate it with wealth and success, without noticing that the people who have those things aren't necessarily happier. While happiness may be more complex for us, the solution is the same as ever. Happiness isn't about what happens to us--it's about how we perceive what happens to us. It's the knack of finding a positive for every negative, and viewing a setback as a challenge. It's not wishing for what we don't have, but enjoying what we do possess. According to the passage, which of the following statements about children is NOT true?
A.
They may get happiness from games.
B.
They may feel happy if they get a role in a school play.
C.
They feel happy all the time.
D.
An ordinary event may put them at a pinnacle of sheer delight.
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【判断题】若离散系统的系统函数H(z)的极点全部在单位圆内,则离散系统的频率响应就是系统函数H(z)在单位圆上的值。
A.
正确
B.
错误
【单选题】审计的基本职能是
A.
经济监督
B.
经济鉴证
C.
经济评价
D.
经济管理
【多选题】若因果离散 LTI 系统是稳定系统,那么下列说法正确的是:(多选题)
A.
系统函数 收敛域包含单位圆。
B.
系统函数 的极点均在单位圆内。
C.
系统单位冲激响应 绝对可和。
【多选题】离散系统的稳定性,从时域和Z域两个方面分析,应满足的充要条件是( )。
A.
单位样值响应满足 ,
B.
系统函数 应满足全部极点应落在单位圆之内。
C.
系统函数 应满足全部极点应在Z的左半平面。
D.
系统函数 应满足全部极点应落在Z 的右半平面。
【判断题】离散系统函数的极点在单位圆内,对应的单位样值响应的波形是衰减的。
A.
正确
B.
错误
【单选题】离散系统的稳定性,从Z域分析,应满足的充要条件是( )。
A.
系统函数 应满足全部极点应落在单位圆之外
B.
系统函数 应满足全部极点应落在单位圆之内
C.
系统函数 应满足全部极点应在Z的左半平面
D.
系统函数 应满足全部极点应落在Z 的右半平面
【单选题】审计的基本职能是
A.
经济监督
B.
经济评价
C.
经济鉴证
D.
经济咨询
【单选题】如果一线性时不变离散系统因果,下列描述正确的是
A.
该系统所有极点均在单位圆内;
B.
该系统单位函数响应h(k) 绝对可和;
C.
该系统的系统函数必须是真分式;
D.
该系统的系统函数 单位函数响应h(k)是右边函数
【单选题】审计的基本职能是
A.
监督职能
B.
监察职能
C.
鉴证职能
D.
评价职能
【单选题】审计的基本职能是
A.
监督
B.
鉴证
C.
评价
D.
建设性
相关题目:
参考解析:
知识点:
题目纠错 0
发布
创建自己的小题库 - 刷刷题