A:若X为直流电源,Y为铜棒接正极,则Fe棒上镀铜
B:若X为直流电源,Y为碳棒接负极,则Fe棒被保护
C:若X为电流计,Y为锌棒,则SO42﹣ 移向Fe棒
D:若X为导线,Y为铜棒,则Fe棒发生还原反应
—Excuse me, sir, there is _____ tea in your cup, would you like some more? —Yes, please. And give me _____ mooncake. It tasted delicious.