二阶导数判断极值

我到处追寻你曾走过的足迹!用英语怎么说? who is your luck baby 连词成句Who your baby is? give it 2 me & u .. The students of Class 4 Student of the class作文怎么写? the way you give it to 初三 英语 help的用法 请详细解答,谢谢! (29 12:36:11)help有几种用法?有help doing和help do的用法吗? what do you do for a-----(live)----fishing 阅读短文根据短文内容完成表格每空一词Skin-diving (潜泳) is a new sport today.This sport takes you into a wonderful new world.It is like avisit to the moon!When you are under water,it is easy for you to climb big rocks,because you a 阅读短文,根据短文内容完成表格,每空一词Wendy is an American girl,she is twelve.She has a younger sister.Her sister and she are both at school.They go to school from Monday to Friday.They don't have any classes on Saturdays or Sundays 根据文章意思和首字母提示写出所缺单词,每空一词.Karl Max was born on May 5thKarl Max was born on May 5th,1818 in Germany.He went to high school and then c___ his studies at a university.he r____ his doctor degree in April 1841.In 三点水加一个效念什么?3Q 三点水加个弱,念什么拜托各位了 3Q 连词成句are,many,sports,There,clubs,my,in,school. guitar里面的i是发短音i的音吗 We are waiting for your absence.A.your explanation B.to have your explanationWe are waiting for your absence.A.your explanation B.to have your explanation C.about your explanation D.having your explanationWe are waiting--------for your absence.A.your () this afternoon you would have to wait for another chance next time.A.the boss didn't return B.the boss were not to return C.were the boss not to return D.didn't the boss return what time的同类词是什么啊? the pictures are on the desk对画线部分提问(画线：on the desk) 根据下列词语 who how what 写出一个同类的词语是who和how还有what这三个词写出一个同类的词语 扩句 雨花石像翡翠 屋里走出老人 湖面上飘着雾 吾乐英语周刊的代理是真的还是假的? ______you_____(see)my pen Yes,I______(see)it on the desk. Can you see apencil on the desk?否定回答No,I _______.这个空是什么? what' s后接什么词 以“My room is tidy”为题写一篇6～10句话的英语作文!急 How many people are there in Flat 4B?WhatHow many people are there in Flat 4B?What does Miss Li love?How many pets does Miss Li have?Who does't like dogs?Is Miss Li kind to her pets? tidy my room 为题 一篇英语作文,40字左右 今天要用 1.What does Kate teach in her school?2.how many people are there in kate's family?Kate is an English teacher .She has a shop in her schooi.Kate's family is in Hangzhou.She has grandparents,parents,a sister and two brothers .Kate is nice teacher snd h 把这个词用英语说出来：他需要的,还要把What用上就是这 小学英语语法基础：如何表达本来该做某事?