试题题干
Summarization
Directions: The paragraph is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph. Spell out the missing letters of the word.
Nowadays sophisticated solar-energy systems called photovoltaics produce electricity from the sun. Photovoltaics run $14,000 to $20,000, but these systems can substantially cut homeowners’ electric bills, depending on sun exposure and electric rates. Excess energy can even be sold back to the electric company for more savings.
Expensive photovoltaics can help save a lot in the long r
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参考答案
试题解析
如今，被称为光伏的复杂太阳能系统从太阳产生电。光伏发电运行需14000美元至20000美元，但这些系统可以大幅削减业主的电费，这取决于日照和电费。过剩的能源甚至可以出售给电力公司，以节省更多的资金。run 运行。