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步进电机跳线是什么意思 梯形面积上底延长4cm,面积增加24平方厘米,原来上底12厘米,求原来梯形的面积?10分钟完成成翻倍. 在一张圆饼上切10刀,最多可得到多少块小饼?切n刀呢?要具体过程,谢拉! 小明在一张比萨上切10刀,最多可得几块小饼 一个梯形面积420平方厘米,如果把它的下底增加12厘米,他的面积是468平方厘米,原梯形的高是多少厘米? (always,usually,sometimes,never,yet) I have _____ been here before.Have you everbeen there?—No,Have you everbeen there?—No,not _____.I often have a rest in the morning and _______ in the evening. 一个梯形面积420平方厘米,如果把它的下底增加12厘米,他的面积是468平方厘米,原梯形的高是多少厘米? You have always been there for me Thousands of people in the disaster areas will suffer a lot if these supplies don't ___in time.A.pay offB.set out C.get throughD.use up求详解 用一根绳子测井深,双股量,井外余3米,3股量,距井底还差1米,井、绳各多少米?（用方程解） people have always enjoyed laughing 是什么时态的 I have always been a person Chinese people have always dreamed of flying to space帮忙翻译下这句话谢谢 I find no people around为什么是这样?I don't find people around 请讲讲相关的语法 I found many people _____(walk) outside . The teacher found Tom was c—— from Liz while she was walking around.填什么c后边写什么 _____ (walk) around your school and _____ (find )the equipment . 7.After the bomb explosion in the cinema,people were seen _________ out of the cinema.A.stepped7.After the bomb explosion in the cinema,people were seen _________ out of the cinema.A.stepped \x05\x05B.walking \x05\x05C.scrambling \x05D.wandering 英语翻译Always there When I'm less than I should be,When I just can't face the day When darkness falls around me And I just can't find my way When my eyes don't clearly see And I stumble through it all You I leen upon,you keep me strong And you r there are _____(hundred) of people dancing at the square after supper. 英语翻译when i'm less than i should bewhen i just can't face the daywhen darkness falls around meand i just jan't find my waywhen my eyes don't clearly seeand i stumble through it allyou i lean upon ,you keep me strongand you rise me when i fallY 是the people after he还是the people after him 为什么 设函数f(x)=(m+1)x2-mx+m-1.若方程f(x)=0有实数根,求M的取值范围 she is the last to 较短的科学家故事3350━68字就够了! 较短的科学家故事0450━68字就够了! 数学题——统计表新风自行车厂去年第四季度生产情况如下：十月份计划生产2500辆,实际生产2600辆；十一月份计划生产2500辆,实际生产2550辆；十二月份计划生产2500辆,实际生产2700辆.先算出每 五线步进电机通过电阻怎么判断相数 步进电机的相数是怎么判定的?一相,二相,三相,四相,五相步进电机有何关联和区别? 如果m、n是奇数,关于x 的方程x2 + mx + n = 0有两个实数根,则其实根的情况是( )(A)有奇数根,也有偶数根 (B)既没有奇数根也没有偶数根(C)有偶数根,没有奇数根 (D)有奇数根,没有偶数根为什么选B 短小的现代科学家故事 较短的科学家故事8250━68字就够了!