文字符号的作用是什么

氨基酸注射液 效果持续几天昨天输了一瓶氨基酸,效果能持续几天啊? 棓丙酯注射液与氨基酸注射液可以一起打吗 短文改错 Dear Kate,1.l'm very excited learn that you短文改错Dear Kate,1.l'm very excited learn that you are coming to 2.my city for your summer vacation.Both of my parent 3.miss you a lot.So did my sister,Cathy.June is the best 4.time of the 用英文介绍一个歌星不要太长～ 东海孝妇”的典故 “东海曾经孝妇冤”典故出自哪里? 长弘化碧,的典故内容,望帝啼鹃,的典故内容．飞霜六月因邹衍,的典故内容．东海曾经孝妇怨,的典故内容? 为什么古人说,地上一个人即将离去,天上就有一颗星星会失去光辉呢?这个典故怎么来的啊! 右旋糖酐40氯化钠注射液的化学名称是什么? 新手英语书英语磁带现在已经工作,想重新学习英语,想从单词着手,可以推荐些书吗?我想买本专门学单词的书,最好书有磁带,方便跟着读. I M Glad (Now More Than Ever) 歌词 “more …than…”句型中than后面能不能加否定从句? He will be more than glad ___there are plenty of books at hand.A as if B as long as C now that D...He will be more than glad ___there are plenty of books at hand.A as if B as long as C now that D in order that 一到英语选择题,顺便说一下原因.-----I think life without old friends is _____.-----I agree.We should often visit some of our old friends.A.a bit boring B.a bit of boring C.a bit bored D.a bit of bored 一到英语选择题原因If you let challenges stimulate____annoy you,much more can be accomplished than you thought possible.A.more than B.other than C.less than D.rather than 一到英语选择题说原因 ················—Tom,everybody was in the hall except you.—Sorry,but I_____my parents water the flowers in our garden.A.am helping B.was helping C.had helped D.helped What's the （ ） of the ring?Aprice B prize 请问选哪个?price 和prize 的区别是什么 暹罗猫的"暹"字怎么读?是什么音啊? 拉丁文的起源拉丁文起源于哪里,具体分析一下, 关于拉丁文的起源和发展!介绍一下他的发展历史和当今在全世界范围内的使用情况!谢谢! 问拉丁语的来源是哪个古国家的语言? 求以下拉丁语来源Non est ad astra mollis e terris via大地通往明星的道路并不平稳Nutritur vento,vento restinguitur ignis火能被风吹旺 也能被风吹灭Dona nobis pacem请给予我们和平 只知道第三句来源于罗马天 请各位帮帮我啊!急用啊,是明天要交的功课!各位请写出来自拉丁文的英文单词,还要把它给列出来,左边是拉丁文的单词,右边是英文的单词.各要有50个,拜托了!~~~谢谢! 如何选择英语口语机构? 短文改错Dear Liu Hong,I am glad to receive you lette. dear Andy l am glad to learn that you aredear Andyl am glad to learn that you are coming to China and will stay at my home.my parents and l are very pleased to have you with US.not let me tell you what we have arranged for you.l know the school Will 需要提高英语口语,不知道该怎么选择,帮忙介绍下呗. 英语短文改错Dear mark,lam glad that 英语口语哪好?该怎么选? 用欣赏造句句子中欣赏的意思要是：享受美好的事物!急,明天要交! 苏州英语口语应该怎么选择,麻烦知道的告诉下! 欣赏是.造句