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理想变压器“三制约”“五不能”在新情境试题中的应用
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作者 龙少英 《中学物理教学参考》 2024年第25期72-75,共4页
以高考热点问题“变压器”为例,介绍情境试题的解题策略,探索适应新高考评价体系的高效习题教学策略,切实完成教学过程从“解题”向“解决问题”的根本转变,丰富学生习题训练的多维度感受,深度挖掘习题训练功能,培养学生物理学科关键能... 以高考热点问题“变压器”为例,介绍情境试题的解题策略,探索适应新高考评价体系的高效习题教学策略,切实完成教学过程从“解题”向“解决问题”的根本转变,丰富学生习题训练的多维度感受,深度挖掘习题训练功能,培养学生物理学科关键能力和核心素养。 展开更多
关键词 三制约 五不能 理想变压器 新情境试题
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Middle Triassic post-orogenic extension on Hainan Island: Chronology and geochemistry constraints of bimodal intrusive rocks 被引量:16
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作者 TANG LiMei CHEN HanLin +4 位作者 DONG ChuanWan YANG ShuFeng SHEN ZhongYue CHENG XiaoGan FU LuLu 《Science China Earth Sciences》 SCIE EI CAS 2013年第5期783-793,共11页
This work studies new petrological and geochemical data and zircon U-Pb ages for bimodal intrusive rocks from Xinglong re- gion, Hainan Island. Zircon U-Pb dating yields mean 238U/26pb ages of 238 ± 2 Ma and 234&... This work studies new petrological and geochemical data and zircon U-Pb ages for bimodal intrusive rocks from Xinglong re- gion, Hainan Island. Zircon U-Pb dating yields mean 238U/26pb ages of 238 ± 2 Ma and 234±2 Ma for diabasic and granitic phases, respectively, representing the Middle Triassic emplacement. The diabase and granite bodies were formed from discrete mafic and acidic magma sources that experienced local mechanical mixing at their mutual contacts. Although SiO2 content of intrusions is bimodal, trace element ratios indicate that both were formed in a post-orogenic extensional setting. Sr-Nd isotopic composition reflects a shared EMII type enriched mantle source component, possibly influenced by subduction-fluid metaso- matism. 展开更多
关键词 bimodal intrusive rocks middle Triassic POST-OROGENIC Hainan Island
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