题目

--- Journalists have to work very quickly in order to_______.    --- I know. I like that. It’s very challenging. A. meet their deadlines                   B. earn a high salary C. avoid being fired                              D. make both ends meet 答案：A7．下列说法错误的是（　　）A．电池充电，电能转化为化学能B．暖瓶塞被热气弹开，机械能转化为内能C．电动机工作把电能转化为机械能D．汽油机工作过程中，化学能转化为机械能