一日为师终身为师

What does "it" refer to here?为什么要加to?去掉to可以吗？ 头七,三七,五七,如题 cross line外壳怎么样R.T 请问cross line的外壳如何?会不会对手机外观有磨损毕竟是铝质的还有会不会对信号有影响请达人给个详解!本人Iphone4裸奔＆提心吊胆ing 在等比数列{an}中,公比q=-2,s5=44,a1= 一道高二抛物线题抛物线y平方＝4x的弦AB＝4乘根号3,则焦点到AB的距离为答案是2,请告诉我解题思路,谢谢了,最好在今晚之前搞定 we often do the practical session in small groups. The court is now in session. she want to be the first to cross that finishing line.为什么不用crossing代to cross? 找规律( ) 4 ( ) 6 3 4 5 ( ) 英语同义句I often take a plane to BeiJing.例如他的同义句：I often go to BeiJing by plane.还有的是怎样的,我老师问!20分钟内解决给分,10分钟内解决追加50分急求啊,除了air 英语 同义句1、I like Msths best.2、Our break is from 4:00p.m.to4:30p.m.3、Mrs Smith is an Art teacher.5、Jason usually heips Tom do his homeworl. 英语同义句,急How can I get to the post office?Do you know ( ) ( ) ( ) the post office? 明朝历代皇帝列表 明朝最后一个皇帝怎么死的 He insists ___in this room.a.staying not b.that he would not stay c.that he not stay.该选b还是c呢 有甲乙丙三个数 甲乙两数的和是100 甲丙两数之和是82 乙丙两数之和是76甲乙丙三数之和是多少?列算式题 i saw him (get)on the bus just now.为什么不能用getting. 甲乙两数的和是36,乙丙两数的和是27,甲丙两数的和是23,甲乙丙三数个是多少 The frist tourist __ the bus was an old man.A.get on B.getting on C.got on D.to get on我选的是C,我不明白为什么要用“to” 小石潭记 三峡小石潭记第二段文字与第一段中哪一句相照应三峡中素湍绿潭 回清倒影运用了什么表达方式 一句英语的同义句My little cat's name is Mimi.转换成Mimi is the （ ） （ ） my little cat 英语同义句(一句)Relaxing from time to time is important to us.改为:It's important ______ us to relax______. 一句英语同义句I want to buy some CDs for him.（改为同义句）哪位仁兄会啊,多谢啦! 英语同义句,就一句suddenly,a rabbit came out of a hole_ _ _ _ ,a rabbit came out of a hole 一个四位数,第一个数与第二个数相同,第三个数与第四个数相同,恰巧是一个完全平方数,求这个数.用算式回答 need 的被动语态是什么 need sleeping =need to be slept 睡觉为什么用被动语态 一个四位数的完全平方,要求前两个数相同,后两个数也相同,且自身是一个两位数字相同的两位数的平方,求这个数.,., the decorator showed no discretion in her purchase for our new house,everything costing too muchmoney.分析下这句话什么结构! 从A地到B地,甲要走3小时,乙要走150分钟,甲,乙两人速度之比是( ) a_地贫基因WS位点杂合性突变,是什么地贫 甲、乙两人分别从A地到B地,甲用了4小时,乙用了3小时,求两人的速度比 丹麦语中爱怎么拼写