题目内容

论述题：要求论述紧扣题意，合乎逻辑。
诺贝尔奖获得者、华裔科学家丁肇中在谈到他的科学研究体会时说：“20世纪70年代，人们已经知道所有的基本粒子是由3种夸克组成的。我的问题是，为什么只有3种夸克？为了寻找新夸克，我决定建造一个高灵敏度的探测器。当时所有的人都认为只有3种夸克，因为3种夸克可以解释所有的现象，所以这个实验被费米国家实验室和西欧核子中心拒绝了，认为是不可能的。 1972年到1974年间，我们在布鲁克海文国家实验室用一个比较低能的加速器来做这个实验，终于发现了一种新的夸克。这就表示，以前说只有3种夸克的观念是错的，有第四种夸克。有了第四种，就有可能有第五种、第六种，把以往的观念改变了。”(见2000年5月2日《人民日报》)
上述科学发现过程在认识论上对我们如何发现和发展真理有哪些启示？

查看答案

搜索结果不匹配？点我反馈

更多问题

有以下程序
inculde ＜stdio.h＞
main()
{ int a[3][3]={(1,2,3),(4,5,6),(7,8,9)};
int B[3]={0},i;
For(i=0;i＜3;i ++) B[i]=a[i][2]+a[2][i];
For(i=0;1＜3;i ++) printF(“%d”,B[i]);
printF(“\n”);
}
程序运行后的输出结果是【1】。

【背景材料】
某承包商参与某高层商用办公楼土建工程的投标(安装工程由业主另行招标)。为了既不影响中标，又能在中标后取得较好的收益，决定采用不平衡报价法对原估价作了适当调整，具体数字如表1-4所示。
现假设桩基围护工程、主体结构工程、装饰工程的工期分别为4个月、12个月、8个月，贷款月利率为1%，并假设各分部工程每月完成的工作量相同且能按月度及时收到工程款(不考虑工程款结算所需要的时间)。
【问题】
1. 该承包商所运用的不平衡报价法是否恰当？为什么？
2．采用不平衡报价法后，该承包商所得工程款的现值比原估价增加多少(以开工日期为折现点)？

Doves flying in daylight use the sun for guidance. But the stars are obviously their most

听力原文： My wife and I spent two weeks in London last year. We went there in the autumn. We think it is the best season to visit England. The weather is usually good and there aren't too many tourists in October. We stayed in a small hotel in the West End. It was convenient as we did most of our sightseeing on foot. Taxis were too expensive, we couldn't understand the bus routes, and my wife didn't like traveling on the underground. She said it made her feel sick.
In fact, we enjoyed our holiday so much that we have already planned again for this year. We're going to take our umbrellas, though, I'm sure we'll need them sometimes.
My wife and I spent two weeks in London last year. We went there in the【11】We think it is the best season to visit England. The weather is usually good and there aren't too many【12】in October. We stayed in a small hotel in the West End. It was convenient as we did most of our【13】on foot. Taxis were too【14】, we couldn't understand the bus routes, and my wife didn't like traveling on the underground. She said it made her feel sick.
In fact, we enjoyed our holiday so much that we have already【15】again for this year. We're going to take our umbrellas, though, I'm sure we'll need them sometimes.