醋酸铅是离子化合物吗

1、在绝热的定容容器内,发生反应：A（s）+2B（g）可逆符号C（g）+D（g）,当下列物理量不变时一定能作为此反应达平衡的标志是A.混合气体的总物质的量浓度 B.混合气体的压强 C.混合气体的总 The pen which l bought yesterday is cheaper.拆分成两个句子 he bought _____ vase yesterday .A.a big new yelllow .B,a new big yellow C.a yellow big new可我觉得 应该是A呀, He bought a computer yesterday.(改为否定句) 帮我猜一个听力词汇类似于这个发音：race fer ration 有几道关于非谓语动词的题想拜托大家给讲一讲!1.Whom would you rather have 空 with you, him or me ?A to be gone B gone C going D go 为什么不选C啊2 A phone call sent him 空 to the hospital .A hurry B hurrying C to hur 谁能用最普通的话给我讲讲非谓语动词的用法,能系统讲一下么比如这些题：只是举个例子,______ from the top of the TV tower,you will find the city far more beautiful at night.A to see B seen Cseeing D see 小学六年级品社知识要点如何把握? Me. Brown didn't live there any longer. 改为同义Me. Brown didn't live there any longer. 改为同义句Me. Brown ___ ____ lived there.We were surprised that he won the first prize in the English competition.改为同义句___ r这个音到底怎么发啊? 怎么发r和l音 R&B 的 ＆发什么音 I live as happily as before 翻译 着急出去,雅思口语和阅读不好, 给点非谓语动词的讲解吧B级难度啊 非谓语动词的讲解 i very very very want I want a very simple as long as you are in 唱歌时的电子音怎么发出来的?在魏晨千方百计中和马天宇的爱不自己中,电子音是如何发出来的呢? 细讲,非谓语动词最好讲的细一些,最好讲到以下几点：1.不定式的用法2.动词不定式的省略3.动名词的用法4.动名词的复合作用5.分词的基本用法6.动名词作宾语和动名词不定试作宾语的区别讲 求详解,非谓语动词求详解_______ from her parents, she was left with her two young sisters--aged three and seven. A. Being separated B. Having been separated C. Having separated D. Had been separated how much does the book _____(值）用所给汉语的适当形式填空 how many parts does the book contain=?=how many parts ()the book()()it? we had everything before us,we had nothing before us,即使你翻译过来了我也理解不了啊我们有一切在我们之前 is very( ) in drawing picture Ainteresting Binterested 出色和优秀有什么区别?这个两个形容词有什么区别,哪个表达的更深些? “优秀”与“优异”区别在哪? 词语优异和优良有什么区别? be动词后面不能接动词原形吗为什么? I hate being along 是什么意思 The foreigners show great interest in Mount Tai（同义句转换)The foreigners___ ___ ___ ___Mount Tai. Hate being deceived是什么意思?