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现有一电源变压器，电源为220V，一次绕组匝数为100匝，有两个二次绕组，一个匝数为50匝；另一个匝数为150匝。则两副绕组的电压为
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2. And their demand for upscale travel is reaching even the most remote corners of the earth, from Tibet to Siberia, where posh hotels are opening in areas once hospitable only to backpackers.
变压器在运行中，只要（ ）和（ ）不变，其工作主磁通Φ将基本维持不变。
3. Shao Qiwen, director of Chin's National Tourism Administration predicts that China's tourism business will be worth a staggering $128 billion this year, much of that coming from 20 estimated 15 billion domestic travelers.
4. Lily Liu, one of the organizers of last November's first-ever China Luxury Travel Fair in Shanghai, which brought high-end hoteliers and tony travel providers together with prospective clients.
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