求xarsinx2的导数

does he have a bag的does是什么意思 He didn't seem to be equal to meeting our demands翻译 To our s___,he doesn't know our names. My legs were ( ) tired that I wanted to stop.为什么只能用so,而不能用too和very It was such ___(tired) work that noboby wanted to undertake it. He had to go to the airport e______ the next day . He hurried to the airport __________(被告知飞机起飞了).(tell)用非谓语 来填空 They are w__ teachers.they are often in nice skirts. 把he didn't go on.he wanded to have a rest.合并为同义句he--have a rest.中间只有两个空 这句话有错误吗Today I’d like to talk about a place where I have been——Egypt. The Whites have lived in the house____they came to the city.A.when B.before C.until D.since我选的是A 答案是D为什么捏呢 -Which of the two T-shirt do you prefer?-Actually I don't like () of them.A eitherB bothC neitherD none为什么选A 如果选B的话要怎么改写? Who is they?They are our teachers.这句话哪儿处错了?改错的部分? Who are they?怎么答 I didn't go to bed until i finished my homework改为同义句I went to bed____ _____ my homework. She was busy _in her rome without noticing me when I entered that day with my younger sisterA standing on her hands B losing weight C staying slimD exercising 寒假英语作文：My winter vacation 英语 形容寒假的词语 My _____ winter vacationMy ______ winter vacation （横线处填形容词,例：interesting,wonderful,etc） he hurried to the classroom的同义句 He hurried to school.同义句hurried划线 He hurried to school.（改为同义句）He goes to school _ _ _ _. He hurried to school.同义句(hurrid划线) 21.Not until I began to work __________how much time I had wasted.A.didn21.Not until I began to work __________how much time I had wasted.A.didn’t I realize B.did I realize C.I didn’t realize D.I realized这里为什么要选B 不选A? not until i began to work[]how much time i had 英语手抄报 I like Engish要好点的非常急 要图片 花们的英语怎么拼 ”花” 英语怎么拼我想写一句话花 请在天堂里照顾好它!注 花是人的名字追20 花-英文怎么拼, A week later,they called me and asked me what that the boys wanted for Christmas. He wanted to be a doctor then(改成否定句） He was sleeping late his mother called him this moring.A.while B.when C.then D.and i surfed the internet and then called one of which the telephon number is providedof which