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习近平同志在十八届中共中央政治局第一次集体学习的讲话中所指出的共产党人精神上的“钙”是指（）。
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Exports are either raw materials or manufactured goods. Raw materials are products of the land， such as cotton， timber or rubber. Some raw materials， such as iron ore， come from mines. These raw materials are often exported by the countries that produce them to other countries where they are made into manufactured goods. Some countries produce food for export， for example， meat， sugar， or cereals such as wheat and maize. These countries are agricultural countries. An agricultural country needs fertile land and a good climate. A cold， dry climate is not suitable for agriculture. A country which produces manufactured goods is known as an industrialized country. An industrialized country cannot always produce enough food for its own needs. In this case， it does not export foodstuffs. Instead it has to import them. It relies on exports of manufactured products and pays for imports with the money it earns from the exported goods. The best title of this passage is（）.
习近平在海南建省办经济特区30周年大会上说，要更大力度转变（），深化简政放权、放管结合、优化服务改革，全面提升政府治理能力。
根据《华润置地写字楼物业服务通用标准（2011版）》要求，供配电系统管理要求高压配电室每（）巡检1次并记录，低压配电室每日至少3次巡检并记录。
简述学前教育发展的新趋势。
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