After Big Protests, Russians Vote for President

俄罗斯举行总统选举,总理普京被预期赢得胜利。除普京外,还有其他四位候选人参与竞选,包括共产党领导人泽尤诺夫和亿万富翁商人普罗霍洛夫。普京曾于2000年至2008年担任总统,由于法律限制,他无法连任超过两届。去年议会选举中出现大规模舞弊指控,导致自苏联解体以来最大规模的街头抗议活动。

摘要生成于 C知道 ,由 DeepSeek-R1 满血版支持, 前往体验 >

This is IN THE NEWS in VOA Special English.

Russians vote for a new president Sunday, and Prime Minister Vladimir Putin is expected to win. There are five candidates on the ballot. The others include Communist Party leader Gennady Zyuganov and billionaire businessman Sergei Prokhorov.

Mr. Putin was president from two thousand to two thousand eight. By law, Russian presidents cannot serve more than two terms in a row.

There were reports of widespread cheating in the elections for parliament, the Duma, last year. Those claims led to the largest street demonstrations in the country since the Soviet Union collapsed twenty years ago. Protesters say Mr. Putin controls Russia through a heavily controlled political system and corruption.

Angela Stent is a Russia expert at Georgetown University in Washington. She was not surprised that the Prime Minister has blamed the United States in connection with the unrest.

ANGELA STENT: "He has really resorted to a tactic that, of course, has been used since he became president in two thousand -- and that is to invoke the United States [as the] enemy, to blame the United States for a lot of Russian problems. And as you saw, in the Duma elections, he then blamed Hillary Clinton, Secretary Clinton, for supporting the opposition and for trying to undermine Russian stability."

President Obama has made better relations with Russia an important part of his foreign policy. His dealings with Russian President Dmitri Medvedev led to a major arms-control agreement known as New START. It also led to increased cooperation on issues like Afghanistan, Iran and Libya.

But Russia joined with China in vetoing a United Nations Security Council resolution on Syria.

Sasha -- a Russian in his twenties who did not want to use his last name -- says he is tired of Mr. Putin. He says he is voting for Mr. Prokhorov, the co-owner of the New Jersey Nets basketball team. Mr. Putin has already shown all that he can do, Sasha says, and he has enough money.

But Anya -- who did not want to use her last name either -- says she is looking forward to Mr. Putin returning to the presidency. She says he helped bring Russia out of economic collapse in the late nineteen nineties.

Another Russian, Natasha, says she is not even going her to vote because she knows the ruling United Russia party will cheat and Mr. Putin will win. She says she does not think the elections will be clean unless there are cameras in the voting stations, as Mr. Putin has promised.

In the December elections, United Russia won the most seats. After criticism of the vote, Prime Minister Putin announced a one-half-billion-dollar program to place two Web cameras at each voting center. Russia has nearly one hundred thousand polling stations.

The last public-opinion survey before the election by an independent group suggested that Mr. Putin will win with sixty-two to sixty-six percent. In two thousand four he was re-elected with seventy-one percent of the vote.

Mr. Medvedev is expected to become prime minister in a new government.

A win on Sunday will make Mr. Putin the longest-serving leader in Moscow since Josef Stalin ruled the Soviet Union.

Two hundred thousand Russians have volunteered to watch for cheating on Sunday. A group called Citizen Observer has been training volunteers.  And that's IN THE NEWS in VOA Special English. I'm Bob Doughty.

___

Contributing: James Brooke, Jessica Golloher and Andre de Nesnera

资源下载链接为: https://pan.quark.cn/s/9e7ef05254f8 行列式是线性代数的核心概念,在求解线性方程组、分析矩阵特性以及几何计算中都极为关键。本教程将讲解如何用C++实现行列式的计算,重点在于如何输出分数形式的结果。 行列式定义如下:对于n阶方阵A=(a_ij),其行列式由主对角线元素的乘积,按行或列的奇偶性赋予正负号后求和得到,记作det(A)。例如,2×2矩阵的行列式为det(A)=a11×a22-a12×a21,而更高阶矩阵的行列式可通过Laplace展开或Sarrus规则递归计算。 在C++中实现行列式计算时,首先需定义矩阵类或结构体,用二维数组存储矩阵元素,并实现初始化、加法、乘法、转置等操作。为支持分数形式输出,需引入分数类,包含分子和分母两个整数,并提供与整数、浮点数的转换以及加、减、乘、除等运算。C++中可借助std::pair表示分数,或自定义结构体并重载运算符。 计算行列式的函数实现上,3×3及以下矩阵可直接按定义计算,更大矩阵可采用Laplace展开或高斯 - 约旦消元法。Laplace展开是沿某行或列展开,将矩阵分解为多个小矩阵的行列式乘积,再递归计算。在处理分数输出时,需注意避免无限循环和除零错误,如在分数运算前先约简,确保分子分母互质,且所有计算基于整数进行,最后再转为浮点数,以避免浮点数误差。 为提升代码可读性和可维护性,建议采用面向对象编程,将矩阵类和分数类封装,每个类有明确功能和接口,便于后续扩展如矩阵求逆、计算特征值等功能。 总结C++实现行列式计算的关键步骤:一是定义矩阵类和分数类;二是实现矩阵基本操作;三是设计行列式计算函数;四是用分数类处理精确计算;五是编写测试用例验证程序正确性。通过这些步骤,可构建一个高效准确的行列式计算程序,支持分数形式计算,为C++编程和线性代数应用奠定基础。
评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值