do的过去式

写在纸上拍照 玻璃割伤为何用双氧水擦洗,在拿出玻璃片之后 《西厢记 》长亭送别中的成语有哪些? 林清玄的散文《三生石》中的“心中的三生石”是什么寓意? 曾经沧海桑田,已化作往事云烟 人们常说的马跟骡子有什么不同? 马是什么生的, 英语翻译Particles were washed by dialysis using 12-kD cutoff dialysis membrane against double distilled water to remove unreacted water salts. 青山隔送行 下一句 两岸青山相对出下一句 两岸青山相对出的下一句 背负青山 下一句是什么? 高一数学都没读要怎么自学啊 青山隔送行 疏林不做美 英语口译证书中哪个更说服力? 英语翻译Cool a 25- to 50 ml round-bottomed flask or Erlenmeyer flask containing 12 ml of concentrated hydrochloric acid in an ice bath in a hood. 英语翻译determined on a preparation containing sugar in a mixture of methanol and formamide Add a letter in the word to make it the name of a kind of clothes.1. cat ( ) 2. bet ( ) 3. sit ( ) 4. pant ( ) 英语翻译句子如下：An artifact of the sample preparation for XPS analysis was considered,but various procedures gave the same result.重点在前半句,XPS为专有名词--X射线光电子能谱求英化达人翻译 英语翻译You must know the conversion factors for themetric system but you do not have to memorize English-metric conversionfactors. Use all the letters of the word "shore"to make an animal. Rearrage the letters of NOR WE to make one word. 英语翻译句子如下国家十五重点科技攻关项目绿色环保型阻垢分散剂耐污染性高浓缩倍数答的好再给加分! 英语翻译the occurrence of chemical elements depends on the existence of stable nuclei 牛和马可以交配吗 改错：（1）Mary asked that when Jim was leaving for China for the meeting.（2）Tony said that he has finished his homework before supper.同义句转换,每空填一词.(1) Because I had to do my homework,I didn't go to the concert last night. 牛与马交配,会生出什么呢 我突然顿悟了!看破红尘了!从小到大我经历了一些事情,也看过一些心理学哲学的书,突然看破红尘了,觉得突然了解了世间万物,都是自然而生,从无到有,都只有本我,本能的我,本我就是道,这个 求解几道高数题,微分跟积分最后一个是xe^3x 怎样识别和防治鹿的弹状病毒感染? 高数微分求解. 汉语语法和英语语法大不相同The grammar of Chinese ( )( )( )( )that of English.S( ) time with family is very important to us.这句的所填单词以S开头.说出你的答案和理由