How to read giraffe in English

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1. The angle between two vectors OA and ob is x, OA = 3, OB = 2, if the point m is on the straight line ob, and the minimum value of OA + OM (1) If θ = π / 3, find the value of vector OA · vector ab (2) If point m is on line ob, and the minimum value of | vector OA + vector om | is 3 / 2, find the value of X? Two questions
2. There are two composite numbers. Their greatest common factor is 1 and their least common multiple is 90. What are the two numbers? In the subtraction formula, the subtracted increases by 6 and the subtracted decreases by 6. The difference is () In a division formula, the sum of the subtracted plus the product of divisor and quotient is 80 Multiplication and division are inverse operations, right
3. 67 of a number is 10 more than 45 of 2.5
4. 1. (negative 8 and 3 / 7) + (- 7.5) + (negative 21 and 4 / 7) + (+ 3 and 1 / 2)=
5. (+ 9 1 / 2) + (- 3 3 / 7) + 8 1 / 2 + (+ 3 / 7) simple calculation
6. Calculation, 1, (- 8 and 3 / 7) + (- 7.5) + (- 21 and 4 / 7) + (3 and 1 / 2) Calculation, (- 8 3 / 7) + (- 7.5) + (- 21 4 / 7) + (3 1 / 2) (- 3 and 2 / 3) - (- 2 and 3 / 4) - (- 1 and 2 / 3) - 1.75 (- 4 7 / 9) - (- 3 1 / 6) - 2 1 / 2 + (- 6 1 / 6) 4,2-12:5-18:5 + 12:1-18:7-2 and 17:8 Subtract the sum of - 3 / 4 and 1 / 2 from 3.5,
7. Simple operation of 7 / 8 minus (1 / 2 + 1 / 3)
8. Simple calculation of 21.7-5 / 8 + 8.3-3 / 8
9. Calculate (3 / 8-7 / 16) / write process (- 21 / 32)
10. 2.72-3.98 + 5.28-2.02 how easy to calculate!
11. What is multiplier principle? What are the preconditions of multiplier principle? Is there multiplier effect in real life?
12. Why is the inductance and capacitor voltage higher than the supply voltage when the circuit resonates
13. What is Archimedes' leverage principle?
14. What are the irregular past tense of verbs in English? Give me an answer by 7 o'clock!
15. In the triangle ABC, if B = 5, angle B = 1 / 4, Sina = 1 / 3, then a is equal to? 3Q
16. In English, do you use the plural as the predicate
17. A circular flower bed in the park is 31.4 meters in circumference. Around the flower bed is a 1 meter wide circular path. What is the area of this path?
18. Plant, flower, in, seeds, our, l, going, am, to, the, garden
19. As shown in the figure, BD is the bisector of ∠ ABC, de ⊥ AB is equal to e, s △ ABC = 36cm2, ab = 18cm, BC = 12cm, then the length of De is () A. 2cmB. 4cmC. 1.2cmD. 2.4cm
20. Should the verb be singular or plural?