双曲线的焦点在y轴上且焦点到一条渐进线7x-9y=0的距离为9

我在注册apple id 的时候有一个state 和zip state好像是用选的吧? 申请表上的City___State___Zip___分别代表什么,怎样填写 =SUM(IF(((date>=$B$2)*(date a number of foreigners visited our school yesterday中为什么用a number of为什么不用the number of? 流年到底是什么意思啊? 可惜流年,忧愁风雨,树犹如此.看到这句词有甚么感觉 岁月清浅是什么意思 求一首原创诗,我现在很空虚,感觉自己很虚度时光,请大家根据我现在的心情写一首古体诗.我会把这首诗当成我此时的写照,和我的座右铭.请高人帮忙在这首诗里写出我的空虚.好人一生平安. invoice 请给我解释一下RT-PCR的图,上面引物是GUS,下面引物是GAPDH,右边数第二个孔是阳性对照,左边第一个是marker 引物名称 引物序列 扩增片段大小 英语翻译 is Human visits是什么意思- 好像是个专业名词 翻译下 爱国主义与民族主义的联系和区别 Unique Visits 是什么 visit 和visits有什么不同 后人常用（ ）这个出自《诗》“像高山一般令人瞻仰,像大道一般让人遵循”一句中的词来赞扬孔子 under-grant-number是什么意思 Style Number Sort:all cartons for the same style number are to be loaded bottom to topColor Sort:all cartons for the same color within the style number are to be loaded bottom to topWidth Sort:if the style contains a width (shoes) load all cartons of 新民主主义与旧民主主义提纲上写道 这两个都是资产阶级民主革命请问为什么新民主主义革命不是物产阶级革命呢?还是革命任务决定革命性质两者都是反帝反封吗? 新民主主义与旧民主主义的区别阶级内容等等 this The old people as well as the children_____ interested in this film because it is so well directedA is B are C was D were If you can get on well with other people,this is( )If you can get on well with other people,this is( ).A.a skill B a habitC an interestD a quality PO Date 外贸中的PO Date /Prm 音标[ti]发踢还是地?在chopsticks里面 Jane is ____ girl,she often takes ____ part in the school's activities.A.active;activeB.an active;activeC.active;an activeD.an active ;an ative要有分析说明, Lily often takes an a____part in the activies in the school根据首字母写出单词 1.Bob often takes an_____part in the school activities.2.今晚上要答案,1.Bob often takes an_____part in the school activities.2We have a student volunteer_____at your school. Tom often takes ( )active part in after school activities.A aB anC theD / 划掉 She often takes part in its a_________ on weekends.