单项选择题

光伏汇流箱的主要作用

A、减少阵列与逆变器间的连线
B、方便维护
C、提高可靠性
D、提高发电效率
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问答题

The Internet is an international network connecting as many as 400,000 smaller networks in more than 200 countries.

答案: The statement is true. The Internet is indeed an internation...
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