The answers to the judgment questions in this English passage (rain)

This is a good problem

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1. Is the English phrase scissors singular or plural
2. Limit calculation of advanced mathematics lim tanx-sinx / x^3 x→0
3. Finding a monotone increasing interval of F (x) = SiNx ^ 2
4. Does the abacus mental arithmetic in grade one of primary school only include addition and subtraction
5. As shown in the figure: it is known that the midpoint a (a, b) point B (a, 0) in the plane rectangular coordinate system satisfies | 2a-b | + (B-4) 2 = 0 (1) (2) given point C (0, b), point P starts from point B and moves at a speed of 1 unit per second in the negative direction of x-axis. At the same time, point Q starts from point C and moves at a speed of 2 units per second in the negative direction of y-axis. At a certain time, as shown in the figure, and s yin = 12s quadrilateral ocab, the moving time of point P is calculated? (3) Under the condition of (2), AQ intersects the x-axis at m, makes the angle bisector of ∠ ACO and ∠ AMB intersects at point n, and judges whether ∠ n - ∠ APB - ∠ PAQ ∠ AQC is a fixed value. If it is a fixed value, calculate the value; if not, explain the reason
6. Do you want to write the multiplication formula of the whole ten times one digit? () × () = () × () = () x () = 120
7. It is known that in the hyperbola X & # 178 / 9-y & # 178 / 16 = 1, a and B are the left and right vertices of the hyperbola, and the line L passing through point a is perpendicular to the X axis, Next: find the trajectory equation of the right vertex of the hyperbola and the point with the same distance from the straight line L For the benefit of both sides, the copy has been proofread,
8. Why is 1 divided by 10 equal to 0
9. Given the solution of the quadratic equation AX ^ 2 + BX + C = 0 about x? You have already answered the answer to this question, but can you tell us the detailed process, thank you. We know that the two univariate quadratic equations ax ^ 2 + BX + C = 0 about X are α and β, and the two equations x ^ 2 + (α + 1) x + β ^ 2 = 0 and x ^ 2 + (β + 1) x + α ^ 2 = 0 about X have a unique common root, so we can find the relationship of a, B and C The answer might be - B / a = - 2 / 5, C / a = - 3 / 25
10. The difference of negative power with or without brackets
11. About, a, of, shoes, mother, for, Ken, pair, his
12. The trousers a pair of shoes
13. This purple bag looks very beautiful
14. Matches new trousers pair this shoes of your
15. English translation I don't know how to use it, such as "1. At this critical moment, he retreated. 2. This decision is related to Tom's life and death, so he thought about it for a long time
16. Several English sentences, phrases translation I decided not to talk to each other Compare yourself with others Make mistakes in a certain way With the help of the teacher Doing a lot of listening practice helps a lot Hard work is the secret of success How do you usually deal with your problems How about practicing pronunciation by reading aloud? The boy is afraid to speak in class Do you have any difficulty in memorizing new words this term Is this session of junior three English master answer I am a junior high school, do not appear I do not know the word. These teachers said are learned. We should make our own
17. English translation 1.We don't believe in criticizing other retailers,but there is nothing particularly exciting out there at present. 2.for your future reference
18. English translation 1. Look at the bright light. 2. Later that day. 3. Walk around the museum 4. Know more about animals
19. English translation 114, he has great ambition and few talents 115, music theory, musical instruments, rent due
20. English translation 1. Spray the orchard 2. Paint the barn 3. In between such chors 4.do reporting for the freelance articles 5.pursue her own demanding schedule 6.crawl into black bear dens 7.hitch up dogsled racing teams 8.set aside 9.tolerance for solitude There have been a few adverse moments since then, but on balance things have gone much better than we had any right to expect 2.we've been able to make up the difference in income by cutting back without appreciably lowering our standard of living. At that time, my parents took over the responsibility of raising me 4. These toys can only be sold to children after meeting strict safety requirements As the carrier of news and public opinion, radio and television supplement rather than replace newspapers As for this magazine, it carries abstracts of articles in many newspapers and magazines all over the world