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破“项和关系”困局 立推理素养之基——以2022年新高考卷Ⅰ的数列题解法为例
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作者 刘江艳 《高中数学教与学》 2022年第11期4-6,共3页
近年来,高考数列题的题型不断创新,数列的通项a_(n)和前n项和S_(n)关系交织,给考生求解带来诸多困难.本文以2022年新高考卷I的数列题解法为例,通过分析归纳猜想、“项”“和”转化等三种求通项公式的思路,探索了如何在夯实知识基础的同... 近年来,高考数列题的题型不断创新,数列的通项a_(n)和前n项和S_(n)关系交织,给考生求解带来诸多困难.本文以2022年新高考卷I的数列题解法为例,通过分析归纳猜想、“项”“和”转化等三种求通项公式的思路,探索了如何在夯实知识基础的同时,培养学生的数学思维,落实发展学生数学推理素养. 展开更多
关键词 数列 通项公式 前N项和 项和关系
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Rethinking Sino-Burmese Relations, 1949-1954
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作者 Liang Zhi 《Social Sciences in China》 2018年第2期153-168,共16页
Between 1949 and 1954,Sino-Burmese relations changed for the better.The U Nu government’s fear and suspicion of the People’s Republic of China meant that it planned to recognize China almost from the start.It was on... Between 1949 and 1954,Sino-Burmese relations changed for the better.The U Nu government’s fear and suspicion of the People’s Republic of China meant that it planned to recognize China almost from the start.It was only after confirming the diplomatic position of other Commonwealth countries that Burma made a move,however,becoming the first non-Communist country to recognize the PRC.Not long after,relations between the two countries began to cool,partly because of geopolitical factors but mostly due to the fact that China’s revolutionary diplomacy was incommensurate with Burma’s pro-British,pro-American tendencies.After the Korean War broke out,Burma rapidly enshrined“neutralism”as the guiding principle of its diplomacy,while China began to establish ties with countries in the“Intermediate Zone.”In 1953,the two countries had the opportunity to repair their relations because of strains in the Burma-US relationship due to remnant Kuomintang forces,rising Chinese demand for Burmese rubber,and a drastic decline in the international market for Burmese rice. 展开更多
关键词 Sino-Burmese relations Five Principles of Peaceful Co-existence neutralism
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