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PV cells [br] Ground-source heat pumpsA、are not yet available for domestic use.
PV cells [br] Ground-source heat pumpsA、are not yet available for domestic use.
游客
2024-01-07
35
管理
问题
PV cells [br] Ground-source heat pumps
选项
A、are not yet available for domestic use.
B、produce four times more energy than they use.
C、can save over £8000 a year.
答案
B
解析
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