What is English group word (plural) in primary school

Please write the plural of the following words_ zoo ______ country _____ tooth ____ mouse __ boy____________ broom ___________ car ____ tree ______ horse ______ bus______________ fox _____ ...

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1. Plural of words Different forms, such as the plural of library is libraries, etc
2. Can the voltage at both ends of RC series circuit capacitor not be adjusted to equal to the supply voltage?
3. In RLC series circuit, I = 1a, ur = 15V, UL = 80V, UC = 60V are known?
4. Resistance inductance series circuit, parallel capacitance It is known that the power factor is 0.555. In order to improve the power law factor to 0.9, the circuit is composed of a 4-ohm inductor and a 6-ohm inductor in series (with a voltage of 10V at both ends and a phase of 0 degrees), and a capacitor is connected in parallel at both ends of the resistance and inductor to calculate the capacitance value
5. How to calculate the quality factor of parallel resonant circuit?
6. Explore the characteristics of ammeter and voltmeter in series circuit and parallel circuit Urgent need
7. If the reactive power Q of RLC series resonant circuit is?
8. The RLC parallel circuit resonates at F0, and when the frequency increases to 2f0, the circuit property is (b) A. Resistive B, inductive C, capacitive For RLC series circuit in resonant state, when the power frequency increases, the circuit will show (b) A. Resistive B, inductive C, capacitive Why
9. Why is the resistance not equal to the supply voltage when the actual series resonant circuit reaches resonance
10. Why is the total voltage not equal to the sum of the voltages on the components in a positive circuit with resistor, inductor and capacitor in series
11. Language, nationality, country, city Help me to fill in the following words! Br_ _ t_ sh Fr_ nch G_ rm_ n _ m_ rican A _ str_ lian Ch_ n_ Am_ r_ c _ A_ str_ lia Fr_ nce G_ rm_ ny R _ ss_ _ Ind _ a sp_ _ n n_ w z _ al_ nd c_ ty m_ sc_w t_ r_ nt_ s_ dn_ y t_ ky_ b_ rl_ n a_ ckl_ nd p_ r_s
12. Nationality, people, language and capital of each country Like this National nationality people language capital China China Chinese Chinese Beijing Can I have more
13. If the complex Z satisfies z-z1 = 2I, Z1 = iz (I is an imaginary number), then z = please explain the solution,
14. Given that the complex number satisfies iz-1i = 1, find the minimum and maximum of iz-ii ∵|z-1|=1 On the complex plane, the corresponding point of Z is p (1,0) The center of a circle, a circle with a radius of 1 Connect the center P (1,0) and the point Q (0,1) Easy to know, | PQ | = √ 2 From the combination of number and shape, we can see that the meaning of | Z-I | is The distance from point to point Q (0,1) on circle p It can be obtained by combining number with shape |z-i|max=1+√2 |z-i|min=√2-1 But how can we get the center P (1,0) and point Q (0,1) in this step
15. Is class plural
16. There is a sentence in which the subject is Smith family. Is that singular or plural It's seven o'clock in the evening.The Smith family _______ (watch) TV. What to fill in
17. Is "people" a countable noun or an uncountable noun? e.g:A great many people conguse success with money. In this sentence, is a great many used to modify a countable noun or an uncountable noun? Is people a countable noun or an uncountable noun? Thank you for your reply
18. Is photo a countable noun? What's its plural form?
19. The verb be after my whole family is singular or plural
20. When family is a collective noun, it means family? The Blakes are a lovely family The Blacks ____ a Lovely family, What to fill in? And should there be an a?