介紹自己媽媽+英語作文 我們全家過著幸福的生活這要歸功於我母親母親四十多歲具有傳統美等和現代意識接受過高等教育有家庭責任感為了我們犧牲了自己事業善於接受新事物近期來她成了股迷還成了足球迷我愛我的媽媽我們有許多共同愛好我們成了親密的朋友

介紹自己媽媽+英語作文 我們全家過著幸福的生活這要歸功於我母親母親四十多歲具有傳統美等和現代意識接受過高等教育有家庭責任感為了我們犧牲了自己事業善於接受新事物近期來她成了股迷還成了足球迷我愛我的媽媽我們有許多共同愛好我們成了親密的朋友


My mother
My mother istall.Shehas longhair.mymother is ateacher.Shevery like children .My mother very like to me.



我的媽媽(英語作文)
用英語來寫這篇作文:
我的媽媽今年38歲,她有一雙烏黑的眼睛和烏黑頭髮,她看起來不是很漂亮去很溫柔,她有一個好看的鼻子和有點胖,仔細看,他的臉上有些皺紋,那都是操心我才有的,他的頭上也有些白頭發,我想那應該也是.我的媽媽在別人眼中可能不怎樣,但在我心裡她是偉大的.


My mom is 38 years old mow,she has a pair of pitch-black eyes andhair.Shedoesn't look very beautiful and tender,but her nose looks nice and she's a little bitfat.WhenI take a good look at her,I ca…



媽媽我想對你說英語作文


My Dear Mother,
I have something to tell you but I have no courage to talk to you about this face by face so I write this letter to you .
Do you know I am under stress?I have no time torelax.Youalways force me to join many classes and extra-curricular activities.I rather hate these things but I can't sayno.SinceI don't want to let you feeldisspointed.Couldyou pleased to help me
I have no enough time for revision and I got a poor result in the exam.I am shamed and fear to tell you .You didn't score me but encouraged me when you received my exampaper.Atthat moment,I was so touching.I felt your loves that you gave me .
Mom,I love you very much .I know you think same asme.Athoughtsometimes I lose my temper,I still love you .
Love,
your daughter/ son



等差數列{an}的公差和等比數列{bn}的公比都是d,且a1=b1,a4=b4,a10=b10(1、4、10均為項數)求a1和d


an = a1 +(n-1)d bn = b1×d^(n-1)a1 = b1 a4 = b4所以a1+3d = b1*d^3(1)a10 = b10所以a1+9d = b1*d^9(2)兩式相减:6d = b1(d^3-d^9)a1=b1=6d/(d^3-d^9)代入(1)或(2)a1=2^(1/3)d=-2^(1/3)…



將PZ220V-60W的電燈L1和PZ220V-100W的電燈L2串聯後接到220V的照明電路中,消耗的功率分別為P1,P2,若將L1
,L2並聯後接到同意照明電路中,小號的功率右分別為P3,P4則P4>P3>P1>P2為什麼?


L1和L2並聯後消耗的功率就是燈泡的額定功率,100w大於60w既P4大於P3.
L1和L2串聯後電流相等且額定功率大的分壓小,額定功率小的分的電壓就高既U2P2
由於串聯以後L1和L2分得的電壓都小於220v,P3>P1
最後得出P4>P3>P1>P2



25.23*4-5.23/0.25簡便計算


=25.23x4-5.23x4
=4x(25.23-5.23)
=4x20
=80



一臺直流電動機線圈的電阻是4Ω,把它接到220V的電路中正常運轉時,電動機的輸出功率是1KW,此時通過電動機的電流是多少?


輸出功率是1KW,I=P/U=1000/220=4.5A



7.28+3.2÷2.5的簡算


7.28+3.2÷2.5
= 7.28 + 3.2 x 4÷10
= 7.28 + 1.28
= 8.56
不理解就追問,理解了請採納!



核能發電是怎樣來的


核裂變



編擬一道關於分式方程150/x=(150/2x)+2的應用題,表述完整,
現在就要~急


從甲地到乙地150千米,騎電動車比騎機車多用2小時,已知電動車的速度是機車速度的一半,求電動車的速度.
設x千米/小時,則150/x=150/2x+2
解得x=37.5