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PV cells Ground-source heat pumps
PV cells Ground-source heat pumps
admin
2011-01-14
10
问题
PV cells
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
转载请注明原文地址:https://kaotiyun.com/show/SHAO777K
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