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tan90度 等于多少? 怎么样地钻出来?（动词或名词） tan∏/2等于多少?tan90°等于多少 tan90º等于多少 tan90度为什么等于1 什么陆地填动词 中国建国后都有哪些重大事件发生 建国后我们国家打过几次仗. 求 建国后的 几次 国家 盘 乱 ?我以前看到过的 谁 知道的 发个! keep sb. 直线l经过抛物线y²=8x的焦点,且与抛物线交于A.B两点,若线段AB中点的横坐标为6,则线段AB的长为? 1956年,正确提出我国社会主要矛盾的会议是 tan90度等于什么比什么 excutive summary是什么意思 l want a toy snake for my birthday.改成一般疑问句、肯定回答、否定句、（划线提问 a toy snake ） a,i,toy,want,car这个句子怎么排序? ---Would you come to my party this morning?---- i'm sorry,___ i'm too busy.(but ,and) 烘干机沸腾炉的点炉操作步骤 in her office memos she tended to devalue the work done by her staff 可以帮忙翻译不? 画出2:1放大的三角形 肯定句:so +助动词+主语 否定句:neither/nor +助动词+主语,能具体讲讲它的用法和意思吗? which toy car does the man take?此处的take,能不能换成buy呢? It takes me forty yuan for the toy car.这里take的用法是对的吗? 【求解】八年级2道几何题..8.若平行四边形的两条对角线的长分别是10厘米和8厘米,则平行四边形的边长的变化范围是_______15.已知：和多边形的一个内角相邻的外交与其余各内角度数总和为600 大哥大姐帮忙翻译一下这段英语Life is full of lots of up and downs But the distance feels further When its headed for the groundAnd theres nothing more painfulThan to let your feelings take You down Its so hard to know The way you feel in 英语翻译Some product applications require properties of hardness and strength to resist penetration under high pressure and to provide maximum wear qualities only on the surface .Where through hardness and the maxium strength associateed with it 有段英语不理解人教新课标8下的一段话：When I was a young girl ,all I ever wanted to do ( was travel),and I decided that the best way to do this（ was to become ） a flight attendant .打括号的两个地方,was travel ,be动词后 丰富了生活,还能什么生活?动词 生活是动词还是名词 just now i watched the students ——（play） on the playground The boss gave me 20% discount,for I was a(an)_______customer of the restaurant.A.common B.ordinary C.regular D.frequent（并说明原因） The man IN THE CAR is my boss(对大写词提问)其实就是对画线部分提问 但是我不知道怎么画线,就用大写代替了 答案也给出了 一部分句子:____ ____ is your boss