A.上午B.下午C.晚上D.夜間零點(diǎn)到4點(diǎn)
A.Ne=γQH/102B.Ne=γQH/1000C.Ne=γQH/100D.Ne=γQH/75
A.Ne=γQH/102B.Ne=γQH/1000C.Ne=γQH/75D.Ne=γQH/100