Is there a good way to memorize English words

Is there a good way to memorize English words

1. 2. Don't memorize words in alphabetical order, it's easy to imprison your thinking. 3. Try to combine each word with an example sentence, and use it flexibly. 4. Review more, a few times, don't be greedy every day, and review in time, Strive for once every three days. 5, the words you can't gather together, take with you, usually read more, unknowingly will, it's amazing
Two high school history problems, please ask the solution, thank you!
From 1900 to 1920, the output value of China's agriculture and handicraft industry accounted for 86% of the total output value of industry and agriculture, while modern industry only accounted for 14%. In 1920, the total output value of China's industry, agriculture and transportation industry accounted for only 7.84% of the total output value, and traditional industry accounted for 92.16%
This reflects that at that time
A. The traditional economic form is still dominant
B. The development of modern industry is slow
C. The imperialist economic aggression against China intensified
D. China's capitalism lacks space for development
I chose B, online answers say a is right and C is right. I want to ask you, these four answers are not wrong, and the meaning is very similar, and they have some connection with the materials. How to do this kind of multiple-choice questions!
Another example is statistics: in Britain, more than 4 million acres of wasteland were reclaimed from 1700 to 1790; in 1700, a farmer could support about 1.7 people; in 1800, he could support 2.5 people; agricultural productivity increased by 47% in 100 years From 1600 to 1800, the per capita output of agricultural workers in England increased by 73%
A. Agricultural economy is the pillar of national economy
B. Industrial output value gradually exceeds agricultural output value
C. Industrial Revolution promotes the development of agricultural economy
D. Agricultural science and technology innovation improves agricultural productivity
I chose D, and the answer is B. I think it's the industrial revolution that brings innovation in agricultural science and technology and productivity, and D is closer. Isn't that right? It's because the promotion of agricultural workers, so you want to promote the development of agricultural economy? Thank you for waiting online
The answer to the first question is a. at that time, the great powers were busy with World War I and relaxed their economic aggression against China
The answer B to the second question is better
Induction formula 200 points
1. Simplification: sin (30 ° + α) × Tan (45 ° + α) × Tan (45 ° - α) sec (60 ° - α)
2. Evaluation: Sin & sup2; 1 ° + Sin & sup2; 2 ° + Sin & sup2; 3 ° +. + Sin & sup2; 89 °
3. Given that θ = (0,2 π), and sin θ and cos θ are the roots of the equation x & sup2; - KX + k-1 = 0, find the values of K and θ
4. Sin α + sin β + SINR + 0 is known, and cos α + cos β + cosr = 0
Proof: cos (α - β) = negative half
1. Simplification: sin (30 ° + α) × Tan (45 ° + α) × Tan (45 ° - α) sec (60 ° - α) = sin (30 ° + α) × Tan (45 ° + α) × Tan (45 ° - α) / cos (60 ° - α) = sin (30 ° + α) / [cos (90 ° - 30 ° - α] × Tan (45 ° + α) × Tan (90 ° - 45 ° - α) = s
sin(30°+α)×tan(45°+α)×tan(45°-α) sec(60°-α)
=sin(30°+α)×tan(45°+α)×tan(45°-α)/ cos(60°-α)
=[sin(30°+α)/ cos(60°-α)]×tan(45°+α)×tan(45°-α)
=[sin(30°+α)/sin(30°+α)]×tan(45°+α)×tan(45°-α)
Find some interesting math problems
Find some interesting math problems~`
In order to save the face of the ancestors' failure in the race, the rabbit family in modern society decided to compete with the tortoise family again. In order to show their strength, the rabbit family said to let the tortoise run 500 meters (2000 meters in the whole race) first. After the tortoise family got the battle book, they held a meeting to discuss countermeasures
Last few years
The result of junior high school mathematics choice calculation (x + 2) is the second power of X () x + 4, then the number in () is ()
China's city gas charges: monthly consumption in 8 cubic meters or below 8 cubic meters are charged 6.9 yuan, the consumption of more than 8 cubic meters in addition to pay 6.9 yuan, more than part of each cubic meter according to a certain fee, a hotel in January gas charge is 82.26 yuan, August gas charge is 40.02 yuan, and know that August gas consumption is equivalent to January, then more than 8 cubic meters, each cubic meter How much is rice gas receivable? ... unfold
China's city gas charges: monthly consumption in 8 cubic meters or below 8 cubic meters are charged 6.9 yuan, the consumption of more than 8 cubic meters in addition to pay 6.9 yuan, more than part of each cubic meter according to a certain fee, a hotel in January gas charge is 82.26 yuan, August gas charge is 40.02 yuan, and know that August gas consumption is equivalent to January, then more than 8 cubic meters, each cubic meter How much is rice gas receivable? Put it away
In mathematics, in is based on E. what does e stand for
E is commonly used in astronomy and architecture, about 2.72
E is about 2.71828
If the solution of the equation system 5x + 3Y = 2 − 3k3x − y = K + 4 is x = ay = B and | K | < 3, then the value range of A-B is______ .
Substituting x = ay = B into the system of equations 5x + 3Y = 2 − 3k3x − y = K + 4, we get: 5A + 3B = 2 − 3k3a − B = K + 4, the solution is: a = 1b = − K − 1, then A-B = 1 - (- k-1) = 2 + K, known | K | 3, we get - 3 < K < 3, so - 1 < 2 + k < 5, so the answer is: - 1 < A-B < 5
What is the calculation formula of downhill curve radius?
S＝ch
A mathematical problem, find the formula and results
4.37 million yuan, down 12.28% is how much, tell me its formula, the results
437 * (1-12.28%) = 3833364 (ten thousand yuan)
437*(1+12.28%)
437 * (100% - 12.28%) = 3833364 (ten thousand yuan)
The number of unit one × the corresponding fraction of part number = part number
In track and field, the length of straight track is the same. As long as the length difference of curve is calculated, the length difference of adjacent track can be found out,
Right. The sum of the difference between the two curves is the difference of the adjacent running lengths
A mathematical problem requires a formula
In 2006, it was detected that 37.3% of 319 cities had grade III air quality. How many cities had grade III air quality?
319 × 37.3% ≈ 119 (pieces)
A: there are about 119 cities with grade three air quality
319 × 37.3% = 319 * 0.373 ≈ 119.
Formula: 319 * 37.3% = 118.987
Therefore, there are about 118 cities with grade III air quality
319*37.3%=118.987