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专业课每______ 学时计1学分。

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The sun exerts more than twice as great a force on the tides as the moon due to its much closer position to the earth.

A completely centralized control structure has a central power electronic converter connected at the wind farm’s connection point.

Most renewable energy systems have, relative to conventional power generation, high initial costs and low running costs.

The output voltage of the inverter is chosen according to the load requirements in stand-alone PV system.

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