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【判断题】
土壤源热泵系统是向土壤或把土壤作为热源或热汇来传输热量的。A.
正确
B.
错误
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A.
in
B.
at
C.
on
D.
for
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【单选题】某矿石船卸货前的排水量和油水存量分别是:卸前58450t和800t,卸后7300t和1000t,则卸货量为( )t。
A.
51150
B.
51350
C.
50950
D.
51550
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