题目

After being on         unemployment for a time due to the financial crisis, he was offered              job he now holds.        A．/; the B．the; a C．the; the     D．a; a 答案：A如图所示的装置中，下列说法中正确的是（　　） A、铜片上有气泡产生B、铜片溶解C、锌极为正极D、该装置实现了电能转变为化学能