特种作业操作证每几年

中国的拼音怎么和国外的二十六个字母一样?是我们仿照国外的,还是他们学我国的! 454.我国是何时由谁提出引进26英文字母改进成为汉语拼音的?台湾也是这样吧? 455.我国是何时由谁提出引进26英文字母改进成为汉语拼音的?台湾也是这样吧? 想找些非常好听的英文歌曲.我想找些英文歌曲,风格类似《helene》《A Place Nearby》,或者非常好听的也可以,很劲爆的类似《hey julie》我也喜欢.还有没有啊？真的我很喜欢的话， 难受的反义词急 They have some English books改为单数形式 they have some ehglish books 改为单数形式 求所有希腊大小写字母及其发音RT我是学数学的,有许多希腊字母都不知道发音有谁能告诉我所有的大小写希腊字母及其发音吗（只要汉语的近似发音就好了）谢谢了 希腊字母的读音,有多少个字母.这些字母是他们的母语吗?似乎比英文简单. 请给我所有古希腊字母的读音 John's aunt is a teacher.She is active.的问句是什么? My aunt was a teacher in the past,but she isn't now.(同义) My aunt ______ ______ ______ a teacher. love may come and love may go翻译成中文意思? What all don't want to work hard.是什么意思? people don't work as hard as they had?是什麽意思啊?那个they had 我打错了！是they did是啥意思啊 Although John made a mistake,there’s no need to dwell on it. 英语翻译Shangshai is my hometown,and there will hold the EXPO after two years later,so we need to make our city beautiful which can help us showing our great country,and city.In my opinion,there are two important points that we need to achieve.Fi 罗比唱的come undone歌词中文是什么意思不对吧 都不通 光伏产业链 硅到太阳能电池板有多少环节?请详细介绍 谢谢 悲伤的反义词是什么 悲伤的反义词是什么请回答 by、on、at the end造句急用 By/In/On/At the end怎么分? on/at/in/by the end of的区别,那些后面加时间,那些后面加地点,求详解 用“in the end”、“ at the end”、“by the end”、“on the end”这四个词填空.1. __________ of last term, we had learned ten lessons.2. There is a book store __________ of the street.3. He tried many ways of earning a living. ______ brother,fat,his,is,boy,the 连词成句 boy,in,black,a,cap,the,Bill,is 连词成句 Can you__it__English?A:say…in.B:speak…in.CCan you__it__English?A:say…in.B:speak…in.C:take…in.D:speak…with 英文名字 女 快.好听的最好前面是 凯 制造太阳能电池板对环境有什么污染 青岛高新区目前经济,生活条件,环境状况如何?未来几年内发展前景怎样 区别at the end of/by the end of/in the end?