English translation 1. Nature reserve 2. Ideal home 3. Provide food and habitat 4. Year round 5. Fish for food 6. Make more space

English translation 1. Nature reserve 2. Ideal home 3. Provide food and habitat 4. Year round 5. Fish for food 6. Make more space

In the northeast of China
1. Nature reserve 2 Dream homeland 3. Provide food and habitat. 5 all the year round. 5Fishing for food. 6Make more room
in the northeast of China
1, nature preserve 2, dream home 3. provide food and shelter
4. all the year round 5. fish for food 6. make more room
in the east of China
In the northeast of China.
1.natural preservation.2.perfect hometown.3.provide food and shelter.
4.all over the year.5.live on fishing.6.offer more space.
in the northeast of China
1. natural reserve 2. ideal homeland 3.offer food and shelter
4. all the year round 5. fish for food 6. make more room
in the northeast of China
in the northeast of China
1. nature preservation 2. promising land 3. provide food and shelter
4. all the year round 5. fish for food 6. make more room
English translation
2. Running in the corridor 3. Wearing a hat 4. Eating in the canteen 5. Playing outside 6. Cleaning the classroom 7. Wearing a uniform 8. 9. School rules 10. Listening to music 11. Fighting with someone 12. A pair of sports shoes
1. Late for work 2. Running in the corridor 3. Putting on a hat 4. Having a meal in the dining hall 5. Playing outside 6. Cleaning the classroom 7. Wearing uniform 8
Late for work
Run in the hallways wear a hat
1.be late for work
2.run in the hallway
3.wear one's/the/a hat
4.eat in the canteen
5.play outside
6.clean the classroom
7.wear a uniform
8.Geography lesson
9. The S
1.be late for work
2.run in the hallway
3.wear one's/the/a hat
4.eat in the canteen
5.play outside
6.clean the classroom
7.wear a uniform
8.Geography lesson
9.The school rules
10.listen to music
11.fight with sb
12.a pair of sports shoes
I'm very happy to answer for you. I wish you progress in your study
1. late for work
2. run in the hallway/corridor
3. wear a hat
4. eating in the cafeteria/canteen
5. playing at outside
6. clean the classroom
7. wearing uniform
8. geography lesson/class
9. school rules
10. listen to the musics
11. fighting with someone
12. a pair of sport shoes
Judge the periodic function and point out its period
1,y=cos(x-1)
2,y=xtanx
3,y=(sinx)^2
1,y=cos(x-1)
This function is y = cosx, which moves 2 units to the right, so it does not change the period of the original function, t = 2
2,y=xtanx
Y = TaNx is a periodic function, but x is going to be bigger and bigger. When the two are multiplied, the image of y = TaNx will be distorted. With the increase of X, the image will stretch more and more severely. So t does not exist
3,y=(sinx)^2
Y = (SiNx) ^ 2 is actually a transformation based on y = SiNx. Y = (SiNx) ^ 2 image is y = SiNx. The lower part of the x-axis is folded to the upper part of the x-axis, and then squared, that is, the image is extended upward. The period is obviously half of the original function. T = Wu
1、2*pi
2. No
3、pi
The period of question 3 is 2 π
There are six tenses in the present tense, the past tense, the present continuous tense, the past continuous tense, the present perfect tense and the future tense
We need to translate it
：）
1. I write with my right hand
2. The student wrote letters to her mum two years ago
3. He is writing on the blackboard
4. Anna was writing poems at 8:00pm last year
5. Tom has written a story
6. I will write to my pen friend
Judgment of periodic function
Whether y = xtanx is a periodic function, and if so, how to judge the periodicity of this kind of composite function
The method of judging periodic function: judge whether f (x) = f (x + T) is true, t is periodic
Xtanx = (x + T) Tan (x + T) is obviously impossible, so it is not a periodic function
English general present tense general past tense present continuous tense general future tense
What's the difference between the present tense, the past tense, the present progressive tense and the future tense?
It is very important for junior middle school students to sum up and review the eight tenses in English learning. When they use them in practice, they often feel more difficult about them. Let's sum up and review these tenses
How to judge a function as a periodic function
Definition of periodic function: for function y = f (x), if there is a constant T ≠ 0 such that f (x + T) = f (x), then function y = f (x) is called periodic function, and t is called the period of this function
Property 1: if t is any period of function y = f (x), then the opposite number (- t) of T is also the period of F (x)
Property 2: if t is the period of F (x), then for any integer n (n ≠ 0), NT is also the period of F (x)
Property 3: if T1 and T2 are the periods of F (x), and T1 ± T2 ≠ 0, then T1 ± T2 is also the period of F (x)
2. Definition: in the set of periods of function f (x), we call its positive number the positive period of function f (x), and its negative number the negative period of function f (x). If there is the smallest one of all positive periods, then we call it the minimum positive period of function f (x), denoted as T ^
Property 4: if t is the minimum positive period of function f (x), and t is any period of function f (x), then Z - (non-zero integer)
Property 5: if the function f (x) has the least positive period T, and T1 and T2 are any two periods of function f (x), then it is a rational number
Note: the constant function is a periodic function, but there is no minimum positive period
The past tense the present tense the past tense the present continuous tense the present perfect tense the future tense and how to remember
I don't know how to use it because I don't know how to judge it in a sentence. Which elder brother and elder sister will answer. I'm very grateful. I don't know what to say when I ask
The first one is well written. Continue to write. Do you have a forum about this? Some tell us that there are other tenses. Then the one tells us how to remember quickly
If you can't find a few typical sentences in each tense, ask the teacher. Then write the tenses, read them repeatedly and memorize them. Take advantage of the characteristics, such as the past tense, he did his home
No wonder those of us who are ignorant but want to know are confused about tense. Another kind of situation is that in the past, it often happened
How to judge whether a function is periodic or not
Let me tell you briefly: periodic function plus periodic function or periodic function; periodic function plus aperiodic function is not periodic function; aperiodic function plus aperiodic function is not periodic function It is impossible to determine whether it is still a periodic function; whether a periodic function is multiplied by a periodic function or a periodic function; whether a periodic function is multiplied by an aperiodic function is not a periodic function; whether an aperiodic function is multiplied by an aperiodic function is not a periodic function
f(x+T)=f(x)
Let me tell you briefly: periodic function plus periodic function or periodic function; periodic function plus aperiodic function is not periodic function; aperiodic function plus aperiodic function is not periodic function It is impossible to determine whether it is still a periodic function; whether a periodic function is multiplied by a periodic function or a periodic function; whether a periodic function is multiplied by an aperiodic function is not a periodic function; whether an aperiodic function is multiplied by an aperiodic function is not a periodic function. ... unfold
Let me tell you briefly: periodic function plus periodic function or periodic function; periodic function plus aperiodic function is not periodic function; aperiodic function plus aperiodic function is not periodic function It is impossible to determine whether it is still a periodic function; whether a periodic function is multiplied by a periodic function or a periodic function; whether a periodic function is multiplied by an aperiodic function is not a periodic function; whether an aperiodic function is multiplied by an aperiodic function is not a periodic function. Put it away
Write an affirmative, a negative, a general question and a special question in four tenses: the general present tense, the present continuous tense, the general past tense and the general future tense?
Write an affirmative, a negative, a general question and a special question in four tenses: the general present tense, the present continuous tense, the general past tense and the general future tense
I am a teacher
I don't go to school
I went to park yesterday
I didn't eat food yesterday
I will play computer tomorrow
I won't play with you tomorrow
I am working
I am not playing