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学霸求教数学题 SolidWorks怎么将一个圆柱,怎么能加上图中所示的螺纹线就是在一个圆柱表面加上这种螺纹线,该怎么操作?（非扫描切除!） 这道数学题,请求学霸 4道三角恒等变换1.若f(x)是奇函数,且当x>0时,f(x)=x^2+sinx,则当x∈R时,f(x)为?A.x^2+sinx B.x^2-sinX C.‖x‖x+sinx D.‖x‖x-sinx2.函数f(x)=√3cos(3x-B）-sin（3x-B）是奇函数,则B等于?A.kπ B.kπ+π/6 C.kπ+π/3 D.kπ-π/ 三角恒等变换1已知sina+sinb+siny=0,cosa+cosb+cosy=0,求cos(b-y)的值 用什么词语描写一个阳光帅气,却没有男人阳刚气息的美少年? 英语翻译　　A.process B.practice C.procedure D.program.选A 英语翻译可能会有点难,The high degree of functional specializationthat first emerged during the Industrial Revolutionrequires the temporal coordination of the manysegmentedactivities within the organization. 三吋日光到底是什么意思啊·为什么经常都看见“三寸”这个词 英语翻译请帮忙翻译一下这句话：The overall scheduling approach of MC2 creates a high degree of contention for the described state那个creates 翻译成 创建 好像有点死板,难道真的翻译成：创建一个高度竞争? I have a very high standard of翻译成中文 HE will give( )some work to do .(they,them) They share the big cake with her 对the big cake 提问 1.It's kind ________ you to share the birthday cake with me.2.The new iPad ________ too much.I don’t have enough money to buy one.A.affords B.spends C.pays D.costs3.—________ will the FourthYangtze RiverBridgebe completed?— In about half a year when my heart is broken ,is it need to fix,why she betray me?i feel so sad ,so sad```````````````` 蛇为什么吃青蛙青蛙一天吃几只害虫 lg5乘log5 10等于多少 为什么log5 24=lg24\lg5 玩魔方块的规律是怎样的有谁知道? 魔方怎么玩?有什么规律吗? We will be shown around the city：schools,museums,and some other places,____other visitors seldom go． A：what B：which C：where D：when We"ll be shown around the city;schools,museums and some other places,___ other visitors seldom go.A.whatB.whichC.whereD.when We will be shown around the city:schools,museums,and some other places,_____ other visitors seldom go.A.what B.which C.when D.Where you will be shown around our school,visiting the places of interest 这个visiting怎么解释 the guests _____around the city this Sunday A.are shown B.will be shown ____you make a plan for study ,you have to follow it .A.EvenB.OnceC.UnlessD.Until 英语翻译If you have elected to opt out of the extended transition period for complying with new or revised accounting standards 英语翻译If you have elected to opt out of the extended transition period for complying with new or revised accounting standards pursuant to Section 107(b),include a statement that the election is irrevocable;句子有点儿长,在看看句子结 I will have some quotes ready for you by tommorrow morning.这句话的成分说明尤其是ready for 做什么成分,是什么词性. 请问谁知道关于动物与动物的一个故事是一只动物用生命来救另一只动物的故事! 就是蛋糕房里面的鲜奶 不是奶油鲜奶里面含反式脂肪嘛? 英语翻译sleeping awake and awakewhen i'm sleepingi've got a dry kind of thirstwhen drenchedon sunny days all i can seeis as shadowand i'm not above being underi'm at the brinkthough i know that i'm emptyi always hide when its my turn to seekmy on