突触后膜兴奋或抑制的是由什么离子引起的

卫星作用 有哪些卫星,又有什么作用 英文翻译 There is evidence of customer engineering approval where specified. 塑料零件盒是什么材料的 氯离子与哪种金属元素产生白色沉淀 做塑料时要什么工具或材料 金属元素的电负性越小,金属元素越活泼. 化学什么样的算沉淀?含有金属元素都是沉淀吗?那究竟什么样的是 城市猎人的中的插曲 apple mango - i love you,i want you,i need you很喜欢这首歌 想设置为空间背景音乐 可是在MP3上找不到这首歌 更找不到这首歌的链接 think,believe,suppose,expect+宾语从句的否定转移是必须的吗 反义疑问句中讲“含有think,believe,suppose,imagine,expect等动词后接宾语从句构成的主从复合句其中有一句：如果主句的时态是过去时等等,疑问句应和主句的人称时态保持一致.如果主语是第一人 think believe 之后的反意疑问句1.I don't think he is a good student,is heI think he is a good student,isn't heHe thinks she is a good student,doesn't heHe doesn't think she is a good student,does he是不是这样的……2.给我一点理论 城市猎人apple mango的歌曲i love you i want you i need you apple mango的空间链接地址 求韩版城市猎人Apple Mango的I Love You,I Want You,I Need YOU空间链接 英语中否定转移时,反义疑问句看从句,如果不否定看什么?与主句时态有关吗 you tell me that need me then you go and cut me Tom comes home after school.（改为一般疑问句） __________ Tom __________ home after school? tell me“I need you ”的意思是什么? 今天温度几度? 今天气温几度啊? 今天的气温有几度啊!今天穿了一件长袖却还很热!快流汗了 今日的气温有几度今日的气温系几度 成语故事 60字60个字! 现在气温达到几度? o come,o come emmanuelO Come, O Come EmmanuelI'm missing you I'm waiting for your spellwithout you my heart will fadeI'll rather leave you life and delete/delay?Come now/out, Come now/out, EmmanuelI'm waiting for your hypnotizing spellCome now/out, C COME中文什么意思拜托各位大神 求富贵门插曲O Come,O Come,Emmanuel快版 i think the movie is very interesting改为否定句 i think the movie is very interesting 如何改成否定句 I think tennis is very interesting.改为一般疑问句 I don't think it's very interesting的反义疑问句? 英语翻译1.令我们惊讶的是,第二天他改变了主意 2.爸爸告诉我任何时候都不要失去信心.3.前几天我碰巧在街上碰到了我们的老校长.4.你愿意和我一起完成这项困难的工作吗