【简答题】如图所3号发光二极管的正极是( )端,负极是( )端。(备注:括号里选填e、f)
【单选题】飞机着陆时必须保持( )和跑道方向一致。
【简答题】An Englishman was once traveling in Italy. One day he went into a small restaurant to order dinner. He understood very little Italian and couldn’t read the menu(菜单). He knew the word for eggs, and so ...
【单选题】Jim who is now our English teacher once ________ as a manager in an international cooperation for 5 years.
【简答题】根据结构特点,疑问句可以分为是非问、()、选择问和正反问。