2. 职称英语
  3. A、They reduce the dependence on backup power.B、They increase the necessity for

A、They reduce the dependence on backup power.B、They increase the necessity for

游客2024-03-09  50
问题
选项 A、They reduce the dependence on backup power.
B、They increase the necessity for backup power.
C、They are the main sources of backup power.
D、They are regarded as the best back power.
答案 B
解析 原文该句开头的as…表明本句中存在着一对因果关系，原文表明：因为使用了不稳定的可再生能源，导致对后备电力有了更高的需求，因此，本题应选B。
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