篮球气孔结构

问到高一三角函数的题目 恒等变换sinβ=2cos（α+β)sinα1.求证tan(α+β）=3tanα2.求tanβ最大值.感动 求算算 请教几道高一三角函数恒等变换题求证：tan ^2 A- cot^2 A=-2 sin4A/ sin^3A That'his an English book 有什么地方错了 That' a book in English.怎么对a book提问— — in English? 英语翻译3、纸蕾丝是西班牙流传的一种工艺,又叫帕吉门,以前是在羊皮上制作的一种工艺,主要用来装饰教堂,现在衍变成在羊皮纸上制作,因其可以作出各种精致的蕾丝效果,所以又称：纸蕾丝 英语阅读（回答问题,只有一篇）John Smith was an old porter.He worked at the station.One morning he stood in the station.He was waiting for the train.Just then he saw a men running towards the trains with a big bag in his hand.“NO train 英语阅读一篇, in sunday morning i cleaned my room and did my homework找出错误 麻烦英文高手翻译这句子.通顺就行了It is well-established that the infant's brain continues to develop throughout the first year of life and even into toddlerhood. DHA is an important nutrient in aiding this development. As babies gradu 冰箱70厘米x60厘米x180厘米,占地面积几平方厘米,合几平方分米 一台冰箱外形尺寸长70cm宽60cm高180cm占地面积多少平方厘米,和多少平方分米! 有人根据课文《桂林山水》的内容编了一副对联.现将下联写在下面,你能对出上联吗?好奇好秀好险桂林山 高中课文《林教头风雪山神庙》,写一副对联 假期作业日记不知道该写什么呢 杭州湾跨海大桥有多少长 He（ cleaned his room） just now.（括号里提问） 68 This pair of trousers___very long,they___very expensive.A.are;are B.is;is C.are;is D.is;are Tom didnt go to the cinema.He went to the space museum.两句并一句 This pair of sports shoes ------very dear.a ,am b.is c.are 日记怎么写才能写多 Did you take part in the Thanksgiving_____(celebrate)?She goes to the____(librarian) desk.用所给词的适当形式填空 Whose ______this pair of sports shoes?横线里填is还是are She will take part in 400-metre___(赛跑)in the meeting.根据汉语提示填词 She will take part in 400-metre__(赛跑)in the sports meeting.用所给词的正确形式填空 The basketball star is at __(little)2.2metres tall.句型转换 同义 在比例尺是1:500000的地图上,量的a b两地的距离是6厘米 甲乙两辆汽车同时从 a b 两地相向开出 3小时后相遇 甲车与乙车速度的比是2:3 求甲乙两车每时各行多少千米 She+took+the+wallet+away+from+the+table是甚么意思 My teacher says that she_______ take part in the meeting.A.would B.is going to C.are going to D.was going to选哪个?为什么? someone took the money from her wallet ,but she did not ( )itsomeone took the money from her wallet ,but she did not (n )it! 英语翻译那我要是想回答这句话，“没有，这些还没被处理过呢”怎么说哦？ 为什么要离开,英语翻译 My brother took the fiowers away from the table 对the fiowers 提问 combine each pair of sentences in brackets ([]) into a single sentence..翻译? have a pair sunglasses 英文翻译