试题与答案

一根均匀金属轴的横截面是一网形,以X表示对其直径的随机测量结果,假设X在区间(1,2

题型:填空题

题目:

一根均匀金属轴的横截面是一网形,以X表示对其直径的随机测量结果,假设X在区间(1,2)上服从均匀分布,则轴的横截面面积S的数学期望为______,方差为______.

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A,B解析: 本案中被诉具体行政行为为封存行为,被告作出行政处罚为新的具体行政行为,不是对原行政行为的改变,故不受审级限制。即使改变被诉具体行政行为,根据最高人民法院《关于行政诉讼撒诉若干问...

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题型:单项选择题

I first went to hear a live rock concert when I was eight years old. My brother and his friends were all fans of a heavy metal group called Black Wednesday. When they discovered that Black Wednesday were going to perform at our local theatre, they all bought (21) for the performance. However, at the last minute, once of the friends couldn’t go, so my brother offered me the ticket. I was really excited!

I remember the buzz (嘈杂声) of excitement inside the theatre as we all found our seats. After a few minutes, the lights went down and everybody became quiet. I could barely make out the stage in the (22) . We waited. Then there was a roar from the crowd, like an explosion, as the first members of the band stepped onto the stage. My brother leaned over and shouted something in my ear, but I couldn’t hear what he was saying. The first song was already starting and the music was as (23) as a jet engine. I could (24) the drum beats and bass notes in my stomach.

I can’t recall any of the songs that the band played. I just (25) that I really enjoyed the show and didn’t want it to (26) . But in the end, after three encores (加演), the show finished. We left the (27) and walked unsteadily out onto the pavement. I felt a little dizzy, as if I had just woken from a long sleep. My ears were still (28) with the beat of the last song.

After the (29) , I became a Black Wednesday fan too for a few years before getting into other kinds of music. Once in a while, though, I listen to one of their songs and (30) I’m back at that first show.

23().

A. loud

B. heard

C. sweet

D. fast

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