醋酸解离度和解离常数的测定

They did't talk in class any more.(同义句） They ____ ___ ___ in class. Europe,in,Italy,is,the,of,south,连词成句 be south of和be in the south of区别be south ofbe in the south ofbe in south ofbe the south of有没有这么用的,区别是什么啊? 请问on the south of+地点和to the south of+地点有什么区别? “贺兰山是我国西北地区的重要地理界线”,是哪几条分界线? He didn't tell u what we should do改为被动语态He started learning to play the violin at the age of four改为复合句She doesn't work in the hospital any longer给为同义句（she ... in the hospital）After school, he sometimes does homewo I didn't tell him what he should do next.(改为简单句) I didn't tell him ____ ____ ____next. when shall we meet tomorrow? let's题目：when shall we meet tomorrow? let's _____ half past ten in the morning.A.take it B.meet it C.do it D.make it 大兴安岭—阴山—贺兰山—巴颜客拉山—冈底斯山 这是什么的分界线啊? they didn't talk in class any more=they（）（）（）in class 不同的生物个体之间有什么关系?群落内的同种生物个体之间有互助也有斗争,不同种生物个体之间有————（四个空） They didn't talk in class any more.(同义句) 什么叫生物种内关系及种间关系 种内关系 种间关系 区分 ( )的月季花（填恰当的词） 贺兰山的地理特征 世界上共多少生物和种类 中国的哪一类生物种类在世界上排名首位?比如动物、植物、细菌、病毒等 be south of /be to the south of /be on the south of /be in the south of /be in south of/be from the south of ,都在什么情况下使用? 用一个拟人句写风 Tom( )come to the party tonight ,but I'm not sure3.Can I watch TV now,mum?No,you ( ).You( )do your homework first4.( )you ride a bike?No,I can't5.Must I return the book this morning?No,you( ).But you ( ) return it before supper.6.What ( )can I do for 形容风的拟人句 I'm not sure if I'm going to Tom's party;I may go to the concert___A.only B.instead C.early D.late请问为什么? i am not sure if i am going to tom is birthday party.i may go to the concert (instead)? “And Paul-why didn't I pick up that he was friendly just because I had a car?”When we look back“And Paul--why didn't I pick up that he was friendly just because I had a car?”When we look back,doubts like these can make us feel bad.But when we When I walked past his window,he didn't stop ______(look) at me Eric didn't even have __________ common sense to send for a doctor when his grandmother had _______Eric didn’t even have __________ common sense to send for a doctor when his grandmother had __________ heart attack.A.a; the B.the; a C./; the D.a; / 沼气肥料中N,P,K含量与作用的研究 When I noticed the puzzled look on his face, I realized that he didn't understand me句首的when为什么不能用until代替 抗倒伏的肥料是什么肥啊?N,P还是K? N P K 化肥各有什么用 Everyone,_____me carefully（仔细地）.I have something important to tell youA.listening B.listening to C.listen toIt's raining hard______.A.in B.out C.outsidestudents must wear————on school days.A.earrings B.watch C.school uniformsYou____