English translation 1.twenty years from now 2.in some science fiction movies 3.find out 4.school clean-up 1. In the infirmary 2. To Make a lot of noise 3. On earth 4. Stop writing This is the English phrase of the people's education press in the second semester of the eighth grade

English translation 1.twenty years from now 2.in some science fiction movies 3.find out 4.school clean-up 1. In the infirmary 2. To Make a lot of noise 3. On earth 4. Stop writing This is the English phrase of the people's education press in the second semester of the eighth grade

20 years later
In some science fiction movies
find
School clean-up
at the doctor’s
Shout with sb.
on the earth
Sign off now
Wa ah, eighth grade
20 years ago
In some science fiction films
find
School cleaning
1. 20 years from now
2. In some science fiction movies
3. Find out
4. School cleaning
1、in the clinic
2.shout at sb.
3.on the earth
In the outline of my phrase review, one is to Yell. One is to Make a big noise, it's next to each other. Is there any difference? We should ask Shout with sb? ... unfold
1. 20 years from now
2. In some science fiction movies
3. Find out
4. School cleaning
1、in the clinic
2.shout at sb.
3.on the earth
In the outline of my phrase review, one is to Yell. One is to Make a big noise, it's next to each other. Is there any difference? We should ask Shout with sb?
English translation
1.Stand up
2.Look right
3.Look left
4.Look up
5.Bend down
6.Cross your arms
7.Put your arms down
8.Put your arms up
9.Put your hands on your head
10.Stand on your left leg
11.Put your hands behind your back
12.Sit down
1. Stand up
2. Look right
3. Look left
Look up
5. Bend down
6. Cross your arms
7. Put down your arms
8. Raise your arms
9. Put your hand on your head
10. Stand on your left leg
11. Put your hands behind your back
12. Sit down
1。 stand up
2。 good-looking
3。 Look to the left
4。 check
5。 Bend down
6。 Cross your arms
7。 Under the arm
8。 Take your hand
9。 Put your hands on your head
10。 Stand on your left leg
11. Put your hands behind your back
12。 sit down
Find the positive period of the following function,
Condition: P 〉 0, P ∈ R, function f (x) satisfies the following conditions respectively, find the positive period of each function
1.f（x-p/2）=f(x+p/2)
2.f(x-p)=f(x)
3. If P > 0, it becomes P
1. F (X-P / 2 + P) = f (x + P / 2) P --- the positive period; 2. F (X-P + P) = f (x), P --- the positive period; 3. If P > 0, it becomes PF (x + P-P) = f (x), ∵ P < 0, ∵ - - P "is the positive period of F (x + P); 4. F (px-p / 2) = f (P (x-1 / 2)) = f (P (x-1 / 2 + 1 / 2) = f (PX). ---" 1 / 2 "is the positive period of F (x + P); 4
The more the better
Swim swimming
2. Run running
3. Get getting
Sit sitting
5. Cut cutting
6. Stop stopping
7. Shop shopping
8. Put putting
9. Hit hitting
10. Fit fitting
11. Pit pitting
12. Knit knitting
13. Kid kidding
That's all I can think of, okay?
fiy=flying
jump=jumping
sleep=sleeping
fight=fighting
swing=swinging
do=doing
eat=eating
watch=watching
There are two other special cases:
1、 You need to double the ending letter and add ing, for example:
run=running
Swim = swi... Expand
fiy=flying
jump=jumping
sleep=sleeping
fight=fighting
swing=swinging
do=doing
eat=eating
watch=watching
There are two other special cases:
1、 You need to double the ending letter and add ing, for example:
run=running
swim=swimming
2、 Words are open syllables (open syllables: vowels + consonants + e, this e does not pronounce), e does not pronounce, remove E and then + ing, for example:
hike=hiking
Make = making ﹣ put away
get put sit cut run swim
eat-eatting
Find the period of the following function
y=5tanx/2,x≠(2k+1)pi
The period of tangent function is π, so the period of y = 5 Tan (x / 2), X ≠ (2k + 1) π is 2 π
The present participle of the present continuous tense, in which case does the verb double write and add ing
For example, in chat, a is the original phoneme, t is the consonant, and there is no silent vowel after the last consonant
1. For verbs that end with a stressed closed syllable and have only one consonant at the end, double the consonant and add - ing. For example: run running, swim swimming, etc.
2. Verbs ending with - Al, - er, - ill, even if the stress is not on the last syllable, should be written in double, plus - ing, such as traveling.
Are the following functions periodic? If so, find out the period?
sin(1-2x);2cosx/2-3sinx/3
Sin (1-2x) is the period T = 2pi / w = 2pi / 2 = Pi
The following is not, should there be a formula
The present continuous tense of verbs, when to e + ing, when to double + ing?
If there is only one consonant at the end of a verb ending in a stressed closed syllable, it should be double written and added with ing
In general, we go to E plus ing, just a few special ones that don't need to go to E
Let's take a few examples: running swimming working, shopping, moving doing
Let f (x + 1) = - f (x) be r constant for X, then the period of function y = f (x) is 2
If the period of function y = f (x) is 3, then the period of function y = f (2x) is 6
Which sentence is right? Wrong and right. Explain the reason
The so-called periodic function, other do not need to understand, as long as remember
F (x + T) = f (x), then f (x) is a periodic function, and the period is t
First, let's analyze the first sentence, because f (x + 1) = - f (x) is r constant for X. first, consider x + 2 as (x + 1) + 1
That is, x + 2 = (x + 1) + 1
Then f (x + 2) = f ((x + 1) + 1) = - f (x + 1)
Then from F (x + 1) = - f (x), we get - f (x + 1) = f (x)
The conclusion is that f (x + 2) = f (x) is obviously a periodic function and the period is 2
Let's analyze the second sentence, which is a bit difficult, because you need to know that the periodic function is only for X, specifically for X
Suppose that y = f (2x) is a periodic function, that is, f (2x) = f (2x + T), but its period is t / 2, that is to say, we should
If f (2x) = f (2x + T) deforms into a function for a single X, that is, f (2x) = f (2x + T) = f [2 (x + T / 2)], then for X, the period is t / 2
The period of the function y = f (x) is 3
If f (2x + 3) = f (2x), then f (2x + 3) = f [2 (x + 3 / 2)]
So the period is 1.5 instead of 6
The last problem is that it's very cumbersome to explain in written language,
There are questions left to me, I hope to help you solve the confusion
What is the adverbial of time in the present continuous tense
Time adverbials often used with the present continuous tense
An action that is going on or taking place while speaking
Please don’t make so much noise. I’m writing a composition.
Don't make any noise. I'm writing a composition
Let’s set off. It isn’t raining now.
Let's go. It won't rain now
Now, at the present, at the moment, today, this week, this year, etc
An action that is in progress but not necessarily in progress
We are working in a factory these days.
We are working in a factory these days
They are compiling a dictionary.
They are compiling a dictionary
Today, this week, this evening, these days, etc
The present continuous tense is emotional when used with adverbs such as always
He’s always quarrelling with others.
He always likes to quarrel with others
She is constantly worrying about her son’s health.
She kept worrying about her son's health
The boy is forever asking questions.
The boy is always asking questions
This kind of situation is often used with adverbs such as always, usually, continuously, constantly, forever, always, etc
Now
Now