小學英語疑問句和特殊疑問句有哪些 哥

小學英語疑問句和特殊疑問句有哪些 哥

一般疑問句:is/are,do/does,can引導的一般疑問句.特殊疑問句:What's your name?你叫什麼名字?What's the weather like today?今天天氣怎麼樣?What about you你怎麼樣?What color is it它是什麼顏色?What would y…
be動詞和do助動詞引導的一般疑問句;
由3w和1h引導的特殊疑問句:what\where\why\how.
be動詞和do助動詞引導的一般疑問句;
由3w和1h引導的特殊疑問句:what\where\why\how.一般疑問句:is/are,do/does,can引導的一般疑問句。
特殊疑問句:What's your name?你叫什麼名字?
What's the weather like today?今天天氣怎麼樣?
…展開
be動詞和do助動詞引導的一般疑問句;
由3w和1h引導的特殊疑問句:what\where\why\how.一般疑問句:is/are,do/does,can引導的一般疑問句。
特殊疑問句:What's your name?你叫什麼名字?
What's the weather like today?今天天氣怎麼樣?
What about you?你怎麼樣?
What color is it?它是什麼顏色?
What would you like?你想要什麼?
what's your favourite subject/season/spots/food?你最喜歡的科目、季節、運動、食物?
where do you live?你住在哪裡?
where are you going to go?你打算去哪裡?
how are you?你怎麼樣?
how old are you?你多大了?
How do you come to school?你怎麼來學校的?
How ofen do you…?你多久做…一次?
how long/tall/heavy/big,…?……有多長、高、重、大?
Which bus goes to…?哪路公交車去……?收起
請幫我解答一下現在進行時的練習題
II.單項選擇
()1.我在照看孩子.
(A)I am looking after the baby.
(B)I'm look aftering the baby.
(C)I look am aftering the baby.
(D)I looking after the baby.
()2.______friend's making ______a kite.
(A)I,me(B)My,my(C)My,me(D)His,his
()3.Is the woman ______yellow your teacher?
(A)in(B)putting on(C)wearing(D)having
()4.Look!The twins ______their mother do the housework.
(A)are wanting(B)help(C)are helping(D)are looking
()5.______are the birds doing?They are singing in a tree.
(A)Who(B)What(C)How(D)Where
()6.Is she ______something?
(A)eat(B)eating(C)eatting(D)eats
()7.你在幹什麼?
(A)What is you doing?
(B)What are you do?
(C)What are you doing?
(D)What do you do?
()8.What are you listening ______?
(A)/(B)for(C)at(D)to
()9.我正在聽他說話.
(A)I listening to him.
(B)I'm listening to him.
(C)I'm listen to him.
(D)I'm listening him.
()10.They are ______their clothes.
(A)makeing(B)putting(C)put away(D)putting on
()11.Listen!She ______in the classroom.
(A)is singing(B)sing(C)to sing(D)is sing
()12.Today Jim ______his white shirt and brown trousers.
(A)is putting on(B)wear(C)put on(D)is wearing
()13.______are you eating?I'm eating ______meat.
(A)What,some(B)Which,any(C)Where,not(D)What,a
()14.They______TV in theevening.Theydo their homework.
(A)are watching(B)can't watching
(C)don't watch(D)don't watching
()15.The children ______football.
(A)is playing(B)are playing
(C)play the(D)play a
()16.They are flying kites.
(A)他們喜歡放風箏.(B)他們在放風箏嗎?
(C)他們在放風箏.(D)他們常放風箏.
()17.Here are manybooks.Please______them.
(A)look(B)write(C)count(D)taking
()18.Look,They are swimming in the river.
I want ______you.
(A)to go with(B)go with(C)helping(D)help
()19.The man _____(work)near the house now.
(A)work(B)works(C)working(D)is working
()20.Look.Lucyis _____a new bike today.
(A)jumping(B)running(C)riding(D)takeing
)1.我在照看孩子.
(A)I am looking after the baby.
()2. ______friend's making ______a kite.
(C)My,me
()3. Is the woman ______yellow your teacher?
(A)in
()4. Look!The twins ______their mother do the housework.
(C)are helping
()5. ______are the birds doing?They are singing in a tree.
(B)What
()6. Is she ______something?
(C)eatting
()7.你在幹什麼?
(C)What are you doing?
()8. What are you listening ______?
(D)to
()9.我正在聽他說話.
(B)I'm listening to him.
()10. They are ______their clothes.
(D)putting on
()11. Listen!She ______in the classroom.
(A)is singing
()12. Today Jim ______his white shirt and brown trousers.
(B)wear
()13. ______are you eating?I'm eating ______meat.
(A)What,some
()14. They______TV in the evening. They do their homework.
(A)are watching
()15. The children ______football.
(B)are playing
()16. They are flying kites.
(B)他們在放風箏嗎?
()17. Here are many books. Please ______them.
(C)count
()18. Look,They are swimming in the river.
I want ______you.
(A)to go with
()19.The man _____(work)near the house now.
(D)is working
()20.Look. Lucy is _____a new bike today.
(C)riding
現在進行時練習題和答案

設集合A中的元素為實數,當a屬於A時,1/1-a屬於A.(1)證明若a屬於A,則1- 1/a屬於A(2)若2屬於A,求集合A
(1)因為當a屬於A時,1/1-a屬於A,顯然a不能等於1
則1/1-a也屬於A,所以1/1-(1/1-a)=1-1/a,證明結束
(2)因為a=2屬於A
那麼,1/1-a=-1屬於A
那麼1/1-(-1)=1/2屬於A
那麼1/1-1/2=2屬於A
故而A={2,-1,1/2}
求證函數f(x)=lg[√(x*x+1)-x]是奇函數
如題.
f(-x)=lg[√(x*x+1)+x]
=lg[√(x*x+1)-x]^(-1)(因為[√(x*x+1)+x]*[√(x*x+1)-x]=1)
=-lg[√(x*x+1)-x](因為lg(1/x)=-lg(x))
=-f(x),
故奇函數
這樣看得懂嗎?
f(-x)=lg[√(x*x+1)+x]
=lg[√(x*x+1)-x]^(-1)
=-lg[√(x*x+1)-x]
=-f(x),
故奇函數
函數連續,一定存在極限嗎?
連續函數一定有界嗎?
怎麼證明?
Y=X,定義在所有實數上,它是連續的啊,可是極限是不存在的。
可今天看到網上說
“函數極限和連續性有什麼關係
0 |解决時間:2006-10-29 21:27 |提問者:小花催眠曲連續是否一定有極限
有極限是否一定連續等
有極限不一定連續,但是連續一定有極限。
一個函數連續必須有兩個條件:一個是在此處有定義,另外一個是在此區間內要有極限。
囙此說函數有極限是函數連續的必要不充分條件。”
有些混亂,
“連續必有極限,有極限未必連續”.一個函數f(x)在點x0處連續必須有三個條件:1,函數f(x)在點x0處有定義;2,函數f(x)在點x0處有極限;3,函數f(x)在點x0處的極限等於該點的函數值f(x0).這三個條件缺一不可,是判斷函數…
已知集合A的元素全為實數,且滿足:若a∈A,則1-a/1+a∈A
1.若a= -3求出A中其他所有元素
2.0是不是集合A中的元素?請你設計一個實數a∈A,再求出A中的所有元素?
3.根據1.2.你能的出什麼結論?
我想說我知道答案只是想問做法
(1)問中A=集合-3,-1/2,1/3,2,-3
但為什麼要把a=3算出的-1/2在反復代入
1-a/1+a這個式子
我自己已經烦乱好了
瞭解了額--
同學們先到先得分
(1)問中A=集合-3,-1/2,1/3,2,-3
但為什麼要把a=3算出的-1/2在反復代入
1-a/1+a這個式子

因為
a= -3,1-a/1+a∈A
a代入1-a/1+a得-1/2,這時,-1/2又∈A,所以可以再次代入1-a/1+a求出1/3,這樣再把三分之1代入1-a/1+a,這樣就都能算出來了
因為你算出來的每一個1-a/1+a都是A集合的一個元素,所以能算出來,這個題目還真難解釋,你有不懂的可以叫我
定義在區間(-1,1)內的函數f(x)滿足2f(x)-f(-x)=lg(x+1),則f(x)=______.
∵2f(x)-f(-x)=lg(x+1),①∴2f(-x)-f(x)=lg(-x+1),②①×2+②,得,3f(x)=2lg(x+1)+lg(1-x)∴f(x)=23lg(x+1)+13lg(1−x)故答案為23lg(x+1)+13lg(1−x)
函數在一點的極限存在,則函數在這一點處的左右極限都存在.
對的還是錯的?
對於二元函數,這句話是正確的.
設S為滿足下列兩個條件的實數所構成的集合
①S內不含1
②若a∈S,則1/1-a∈S
問:在集合S中元素的個數能否只有一個?
不能
1/(1-a)=a這個方程在實數範圍內無解
0zheyang a

不能
這個方程在實數範圍內無解