寫兩篇不同的英語日記.記錄自己星期天在家幫組媽媽做家務的情况，用等時間順序chi

November，6th，Sunday，sunny
Today isSunday.Dadwent to work early in the morning.
At about seven，I gotup.Momcooked breakfast forus.Itwasyummy.Afterbreakfast，I helped mom do somehousework.FirstI washed the dishes.I washed them verycarefully.Andmom praisedme.ThenI washed some of myclothes.Momwashed all of the rest.I couldn't wash so fast as my mom，but I tried mybest.Afterthat，I cleaned the window withmom.Everytime I finished one，I had a look at it，and found it was bright and clean.I was very happy.
Finally，in the afternoon，I swept the floor and moppedit.WhenDad came back home，He was surprised and said I was a very good boy.I was happy.
November，6th，Sunday，sunny
It is Sunday today，and it wassunny.ButMom told me I couldn't goout.Becauseit was cold and she holped me keep away from catching acold.Itwas boring and I wasunhappy.Afterbreakfast，Mom told me to help her with thehousework.Itwas better than having nothing todo.FirstI helped mom clean thewindow.Itwas uneasy to make them very clean，but Itried mybest.ThenI washed myclothes.Momtaught me how to make them clean.I washed them with asoap.Andthen，I mopped the floor，I did a good job，and mom praised me forthat.Finally，in the evening，I helped my mom cookrice.Momsaid it was delicious.

關於做家務的英語作文
有關做家務的，主要就是說家庭成員喜歡幹什麼家務不喜歡幹什麼家務…
一個小時內

On weekends，I often help mum do some washing，I can't cook .But my sister often does some cooking，because she likes it .My brother often clean our rooms，sometimes he help my father wash ourcar.Myfath…

幫父母做家務的英語作文
內容要包括：
1、你認為有必要幫父母做家務嗎？
2、說說你幫父母做家務的經驗.
3、你從做家務中學到了什麼？80詞左右

Do the housework.A day，I sit there is no thing on the sofa and do it，And but mama in busy inside the housework is doing in busy other parts ofcountry.Sawmama 's busy figure，―of an idea flashes…

當x的2時，（x-x²；-5）-（2x²；+7x-3）等於【】

先化解得-6x-3x²；-2=-26.

下麵三題在什麼條件下成立？a的平方大於a a大於負a a的絕對值大於a

a²；＞a
a²；-a＞0
a（a-1）＞0
a＞1或a＜0
a＞-a
2a＞0
a＞0
a的絕對值＞a
a＜0

計算4x四次y二次-5x二次y二次-9y二次

4x四次y二次-5x二次y二次-9y二次
=y^2（4x^4-5x^2-9）
=y^2（x^2+1）（4x^2-9）
=y^2（x^2+1）（2x+3）（2x-3）

求解e的X次方×X的負1/2次方的積分是多少？

樓主你的題目打錯了應該是e的1/2x次方然後用換元法做出來就好了

設兩個非零向量e1和e2不共線，如果AB=e1+e2，BC=2e1+8e2，CD=3（e1-e2）若模e1=2模e2=3，e1與e2的夾角為60度，是確定k，使ke1+e2與e1+ke2垂直

因為Ke1+Ke2與e1+Ke2垂直，所它們之間的乘積為零，即（Ke1+Ke2）（e1+Ke2）=0然後展開又由於e1*e1=4 e1*e2=2*3*cos60=3，e2*e2=3*3*cos0=9代入上面的展開式就可以得到一個關於K的方程，解開就得到K的值，至於AB，BC，CD是…

3x-5y+2z=1 4x+5y-z=5 x-5y+3z=-2

3x-5y+2z=1（1）
4x+5y-z=5（2）
x-5y+3z=-2（3）
（1）+（2）得7x+z=6（4）
（2）+（3）得5x+2z=3（5）
（4）X2-（5）得9x=9 .所以x=1
將x=1代入（4）得z=-1
將x=1、z=-1代入（1）得y=0
即此題結果：x=1、y=0、z=-1

解方程：0.5x=0.01+3/（5x）
還有0.4x=0.8（1/30+1/x）謝謝

1.兩邊乘以5x:
2.5x^2-0.05x=3
50x^2-x-60=0
x1=[1+√（1+12000）]/100=0.01+√1.2001
x2=0.01-√1.2001
2. x=2（1/30 + 1/x）
15x^2-x-15=0
x1=[1+√（1+900）]/30=（1+√901）/30
x2=（1-√901）/30

寫兩篇不同的英語日記.記錄自己星期天在家幫組媽媽做家務的情况，用等時間順序chi