溴与乙烯加成机理

The Class1,Grade7 students are planning a trip.这句子的同意句 英语.请把英语的所有语法告诉我下, 简单句、并列句、复合句分别都包括哪些? 哪位可以告诉我英语的一些语法之类的什么 sb.sth.系动词 be动词讲的多点好 How many oranges do you want?和How many bananas do you want?这两句咋回答?How many oranges do you want?和How many bananas do you want?这两句咋回答? 今年六月的英语四级怎么算分的? 英语作文求思路 英语作文 求思路用一般现在时,一般将来时,现在完成时,被动语态写一篇80词左右的英语作文应该选什么呢? 关于计划英语作文就谈谈计划的重要性, 英语翻译If the judiciary wasn't satisfied that the proposals would safeguard its independence it was "highly doubtful" that they should be allowed to proceed. but （）so many classes,i am really （）and want to have a rest 求助一题反义疑问句（初二）Chemical factories mustn't ler out dirty water into rivers,_____ ____?请问下这是祈使句不?是will they呢,还是must they? 一道改写句子题,改反义疑问句的,He can hardly speak French.改成反义疑问句He can hardly speak French,[ ] [ The Class 5,Grade 7 students are a______ in the park now. 客机在空中飞行时有没有倒档? 客机在天空飞的高度是否有氧气? 有关一见钟情和真爱的英语作文 求一篇120个词左右的,有关于“一见钟情”的英语作文 求英语作文论点Adults should need to pass a comprehensive parenting test and gain a parenting license before they have children.We are all actors upon the stage of lifeA look at the comparisons and differences between North and South China. 英语作文论点强大的国家去救济贫穷的国家有什么好处又有什么坏处 一个元音字母在单词中怎么样判是单元音还是双元音 为什么有的单词有两个元音但是前面的不发字母本身的音?比如sweater LA是指美国的那个港口?今天公司同客户签合同,客户指定目的港市LA,但我不知是指哪,请高人指教. 上海,香港,新加坡,横滨,东京,釜山,迪拜,开普敦,鹿特丹,安特卫普,汉堡,布兰梅,纽约,洛杉矶,西雅图的港口缩写, LA到底是美国哪里? 美国有哪些港口 形容词后能否接宾语 介词后面可接形容词作宾语吗 can you help ____ _____housework. Dog什么意思 “dog”是什么意思 could you help me with the housework(改为同义句） could you help me （ ） （ ） the housework