不会写的寒假作业怎么办

Are there any books in the bag?Yes,they are.里面的哪个词错了? Are______coats yours?Yes,they are.A.the B.that C.this D.ther are these men's coats yours?yes,they are.为什么不是arethese man's coats yours?yes,they are -Are these coats_____ -Yes,they're ours. 1.--Are these yours?--Yes,they're_____shoes1.--Are these yours?--Yes,they're_____shoesThanks2.--Are these_____?--No,they aren't.Mine are black. A:Whose ___ are these?B:These coats are too big for me.They're ___ mine.连接上面的.C:Those coats are mine.They're my ___ clothes 动物的成语是什么 已知sinα=3/5,α∈（派/2,派）求cos（α+派/3）,sin2α,tan2α的值 A:What's this in English B:It's a jacket.A:What color is it B:It's blue A:Yes,it's a___ Do you have any time this afternoon?Yes,---------------- A What are you B.What' going C.What's upD.What's the matter Is this your chair?Yes,it's 改错 247*342 巧算 900-65+235巧算 ±算术平方根5 这表示什么 已知α∈（π,2π） sinα+cosα=1/5 求sinα*cosα sinα-cosα 已知sinα+cosα=1/5,π 144的算术平方根是多少? √144= √144 是算术平方根还是平方根 平方差公式（2x+3）（2x-3）答案是4x²-9还是4x²+9? (2x-y)(-y-2x)用平方差公式应用 十六分之九的算术平方根是多少 要用符号表示求大神帮助 算术平方根的符号表示 求下列个数的算术平方根,并用符号表示出来（7.1）² （-3.5）² 2.25 2¼一个小时内, a的算术平方根的平方根如何用符号表示 算术平方根符号怎么打? 利用分解因式计算19 931 992的平方÷(19 931 991的平方+19 931 993的平方) 保时捷991 992 993 995.997这都是些什么车型,代表什么意义, this is a big dog.对big提问,用How 怎样证明993的993次方和991的991次方能被1984整除? this is a big dog的意思快 将 it is a big dog 改成一般疑问句 this kind of dog is for------dogs.(big)