塑料烧杯的作用

rational function rational function 是怎么定义的?1.（1/x+1/5）/(1/x+1/3)2.√(x+1)上面两个是吗? strangle,choke的区别是什么?rational ,reasonable区别是? to make appear rational and reasonable 中 appear的词性及释义 有没有七年级人教版英语非谓语动词总结啊,是词的总结, spend on 和spend in 到底用哪一个? （等待英语高手）intend加从句用不用虚拟?我已经问两次了,都没有人回答,拜托了,知道就指导一下吧,感激不尽! 英语翻译要意译不要字译 In July 1921,the communist party of China national crisis,born with comrade MAO zedong as the mai求翻译 ASHBY PLACE BAR怎么样 Don't walk on the grass or pick the flowers us 中填什么? 《毛泽东的故事》中有哪些具体事例 MIKADO SUSHI BAR NOODLE HOUSE怎么样 只背过四级词汇,没有背过六级,可不可以开始背雅思和托福? cancel什么意思 【我喜欢兔子】翻译成英语 SUSHI BAR怎么样 MINAMI SUSHI BAR怎么样 THE SUSHI BAR怎么样 ECHO SUSHI BAR怎么样 The time of year when day and night are equal in length everywhere is known as an equinox请问这个是甚麼意思呢 RICE RICE怎么样 三个人把折一个虎字,打个成语? 请教三个月学完新概念英语第三册可能吗?第一册和第二册我都学玩了,想学第三册了,三个月可以学完吗? The Client undertakes that the signatory below is authorised to sign the Con是一份合同里的句子,该怎样翻译才合适呢?The Client undertakes that the signatory below is authorised to sign the Contract for and on behalf of the Client.完 standard variance是什么意思 davis standard是什么意思 王戎七岁,尝与诸小儿游,看到边李树多子,折枝.诸儿竞走取之,唯戎不动.人问之,答曰：“树在道边而多子,此必苦李.”取之信然.王戎亦往看.虎承间攀栏而孔 ,其声震 地,观者无怒辟易颠扑,戎甚 I don't get lot sleep这句英语是什么意思!在冰河时代这首歌里有一句歌词I don't get lot sleep谁能告诉我最准确的意思?冰河时代：歌词片断I need you back to stay I get my Inside out, and my headache won’t stop I f 请问Has he had any beef or chicken He hasn't had any beef.He has already had some chicken .这里的had 当什么讲呢 当有 还是当吃 还是说当什么都可以 请指教 jamu herbal it\'sok什么意思 老师叫写 《 我的偶像.》 我准备写科比 300字左右