![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
Tom with Tony as the subject, which is the singular or plural
With tone is the attributive of Tom
As shown in the figure, in △ ABC, ∠ ABC = ∠ ACB = 80 °, D and E are the points on AB and AC respectively, ∠ DCA = 30 ° and ∠ EBA = 20 ° to calculate the degree of ∠ bed
Make ∠ BCF = 60 ° and intersect AB and be at points F and g respectively, connect EF, DG, ∵ ABC = 80 °, ∵ EBA = 20 °, ∵ GBC = 80 ° - 20 ° = 60 °, ∵ BGC is equilateral triangle, ∵ DCA = 30 °, ∵ ACB = 80 °, ∵ DCF = ∵ BCF - (∵ ACB - ∵ DCA) = 60 ° - (80 ° - 30 °) = 10 °
Plant the seeds in the soil.put the pot in the sun .Add water often.Water ofen.Wait for a sprout?
Bury the seed in the soil, then put the pot in the sun, water it often, and then wait for it to germinate
There is a flower bed in a park (as shown in the picture). In the middle is a square with a side length of 10 meters, and there are semicircles around it
How many meters did he walk about after 10 circles? How many square meters is the area of this flowerbed?
1. How many meters did he walk? 2. How many square meters is the area of this flower bed?
3.14 times 10 times 2 times 10 3.14 times 5 & # 178; times 2 plus 10 times 10
=31.4 times 2 times 10 = 78.5 times 2 plus 100
=62.8 times 10 = 157 plus 100
=628【m】 =257【m²】
I's plural too's synonym boring's antonym no's homonym
They are: we, very / quite / rate, interesting, know
I wish you progress in your studies and make progress! (*^__ ^*)
If you don't, you can ask me again:)
In the triangle ABC, it is known that the opposite sides of angle a, angle B and angle c are ABC respectively, and the angle c is equal to 2 times of angle A. if the triangle ABC is an acute triangle, the value range of C is larger than a
∵C=2A
∴sinC=sin2A
∴sinC=2sinAcosA
According to the sine theorem, we can get the following results
c=2acosA
∴c/a=2cosA
∵ a + B + C = π, ABC is an acute triangle
∴C=π-3Aπ/2,A>π/6
And 3a = π - Ca
Who can arrange the rules of verb past tense in English for me
Who can help me sort out the rules of verb past tense in English, such as when to add - ed, when to add - D, irregular changes and so on, such as buy bought and so on
There are two kinds of participles in the past: regular change and irregular change
1) Rule change
Pronunciation and explanation of case words
Past participle
Generally, add - ed look after the original verb
call
open
need looked
called
opened
needed looked [lukt]
called [kC:ld]
opened [5EupEnd]
Needed [Ni: did] ① - ed after clear consonant phoneme
It is pronounced as [t], after voiced consonants it is pronounced as [D], and after vowels it is pronounced as [D]
② - ed in [t], [D]
The last pronunciation is [ID]
③ But fix's past tense and past
The participle x is fixed
Verb ending in - E plus - d move
phone
hope
agree moved
phoned
hoped
agreed moved [mu:vd]
phoned [fEund]
hoped [hEupt]
agreed [E5^ri:d]
Verbs ending with a consonant and a Y, change y to I,
Plus - ed study
carry
try studied
studied
carried studied [5stQdid]
carried [5kArid]
tried [traid]
For words ending with the original letter plus y, add - ed play directly
enjoy
stay played
enjoyed
stayed played [pleid]
enjoyed [in5dVCid]
stayed [steid]
If there is only one consonant at the end of a stressed closed syllable word, double write the consonant and add - ed stop
plan
fit stopped
planned
fitted stopped [stCpt]
planned [plAnd]
fitted [5fitid]
For words ending with - R, double R,
Add - ed preference
refer preferred
referred preferred [prI`f:d]
referred [ri5fE:]
2) Irregular change
The past tense and past participle of some verbs in English vary irregularly, which can be divided into five situations
1. The original form, the past tense and the past participle are all in the same form
Example:
Past participle
Cut
Hit
Cast
Hurt
Put
Let
Shut (off)
Cost
Set
Rid cut
hit
cast
hurt
put
let
shut
cost
set
rid cut
hit
cast
hurt
put
let
shut
cost
set
rid
The past tense and the past participle are in the same form
Example:
Past participle
Find
Pay
Leave
Lend
Meet
Keep
Lose (lost)
Teach
Sit
Lead
Win find
paid
left
lent
met
kept
lost
taught
sat
led
won found
paid
left
lent
met
kept
lost
taught
sat
led
won
3. The original form of the verb is the same as the past participle
Example:
Past participle
Come
Run
Become a cam
ran
became come
run
become
4. The original form of verb, past tense and past participle are completely different
Example:
Past participle
Give
Fly
Drink
See
Go
Know
Wear
Speak gave
flew
drank
saw
went
knew
wore
spoke given
flown
drunk
seen
gone
known
worn
spoken
There are two forms of past tense and past participle
Example:
Past participle
Burn burned
burnt burned
burnt
Learn learned
learnt learned
learnt
Smilled
smelt smelled
smelt
Spell spelled
spelt spelled
spelt
Shined (irradiation)
shone shined
shone
Leap LED
leapt leaped
leapt
Tips
a. The past tense of be is in the same form as the original
Beat, beat, beat, beat, beat
b. Lie has two kinds: regular change and irregular change
By: lie lied, lied
Lay, lain
c. Hang has two kinds: regular change and irregular change
By: Hang hanged, hanged
Hang, hang
d. Welcome is a regular verb and should not be misused as an irregular verb
Ratio: welcome, welcome, welcome (positive)
Welcome, welcome
e. Don't mistake irregular verbs for regular ones
Ratio: hit, hit, hit
Hitted, hitted
(1) Is there insulation between slide plate and resistance wire of sliding rheostat (2) function of sliding rheostat (3) working principle of sliding rheostat
The voltage in the control circuit
When the circuit resonates, compare whether ur and input voltage are equal? Whether UL and UC are equal? Analyze the reasons
Ur is equal to the input voltage, ur is equal to UC, and the phase is opposite, because when the circuit resonates, there is ω L = 1 / ω C, and the total impedance in the circuit is R + J, ω L + 1 / (J, ω C) = R, which means that only resistance R exists, so the voltage drop ur on R is equal to the input voltage, and because the inductive reactance and capacitive reactance are equal, but the phase is opposite (one is j, the other is - J), UL and UC are equal, Opposite phase
What are the main functions of leaves? What are the conditions, places, principles and products of photosynthesis? What is the significance of photosynthesis?
*The main functions of leaves are respiration, photosynthesis and transpiration
*Conditions of photosynthesis: light energy, carbon dioxide (CO2)
*Place: chloroplast
*Principle: inorganic matter into organic matter, and release energy
*Products: oxygen, glucose
*Significance: to maintain the balance of carbon and oxygen in the biosphere
RELATED INFORMATIONS
- 1. Can a giraffe bark? If so, what kind of sound is it? If not, why?
- 2. Factorization of rational proper fraction How do you know it's decomposed like this? How can you tell the denominators? How to use the undetermined coefficient method to solve these problems?
- 3. If the folded rectangle is similar to the original rectangle, the ratio of length to width of the original rectangle is______ ．
- 4. It is known that, as shown in the figure, ⊙ o is the intersection point e of the chord AB and CD, ab = CD, and the proof is AE = De
- 5. The intersection of ellipse C1: x ^ 2 / A ^ 2 + y ^ 2 / b ^ 2 = 1 (a > b > 0) and parabola C2: x ^ 2 = 2PY (P > 0) is m. the tangent of parabola C2 at point m passes through the ellipse (1) if M (2, (2 √ 5) / 5), find the standard equations of C1 and C2. (2) find the range of eccentricity of ellipse C1
- 6. If a quadratic trinomial only contains the letter A, its coefficient of quadratic term is - 2, coefficient of primary term is 5, and constant term is - 10, then the polynomial
- 7. 7 / 10 of 1m, 1 / 10 of 7m, which is bigger Which is bigger, 7 / 6, 4 / 5, 5 / 6
- 8. The bottom of a triangle is 3 decimeters, and its area is square decimeters. How many decimeters is its height
- 9. 8. The bottom of a triangle board is 26 decimeters, 14 decimeters less than the height. What is the area of this triangle board
- 10. How to find the first n terms of the square of sequence an = n and Sn = 1 + 4 + 9 + 16 + 25 + (n) 2, where 2 is the square
- 11. The difference between a lot of a large number of all kind a great deal of
- 12. If the odd function f (x) defined on R satisfies f (2x) = - 2F (x), f (− 1) = 12, then the value of F (2) is () A. -1B. -2C. 2D. 1
- 13. Sin1 degree, what formula can you work out
- 14. Sin ^ 4 + cos ^ 4 = 1, find sin + cos=
- 15. The relationship between velocity and displacement of linear motion with uniform velocity An ice hockey glides on the ice, passes two distances L in turn, and continues to move forward. The time t for it to pass through the first distance is 2T, and the time for it to pass through the second distance is 2T. If the ice hockey moves in a straight line at a constant speed on the ice, the speed of the ice hockey at the end of the first distance is calculated Take the starting time of ice hockey passing point a, B as the end of L, C as the end of the second section From a to B: l = (V0 + V1) / 2 * t (1) From B to C: l = (V1 + V2) / 2 * 2T (2) From a to C: 2L = (V0 + V2) / 2 * 3T (3) According to the above formula, V1 = 5L / 6T From the above equation (1) (2) (3), we can get: V1 = (5L) / (6T) how to calculate this step I need to know the questions in the supplementary questions
- 16. Fill in the appropriate operation symbol in 0 to make both sides of the equal sign equal 3○3○3○3=8
- 17. Let a = (x1, Y1), B = (X2, Y2) and a, B not equal to 0 1. The method of finding the collinear and co directional coordinates of a and B 2. The method of finding the collinear and reverse coordinates of a and B
- 18. If the center of circumscribed circle of triangle ABC is known to be o, AC = 6, BC = 7, ab = 8, then vector Ao × vector BC =?
- 19. Please list some examples of rotation in real life, and point out the center and angle of rotation RT.
- 20. In the same coordinate system, draw the image of the following groups of functions: (1) y = x, y = 1 / 2 x, y = 2 X (2)y=1－｜x｜,y=1－1/2｜x｜,y=1－2｜x｜