Take any two numbers from 22, 28, 38 and 55, and what reciprocal numbers can they form? Please list them all

Take any two numbers from 22, 28, 38 and 55, and what reciprocal numbers can they form? Please list them all

It's Husu, isn't it
28 and 55, 38 and 55

Put the proper prime number in the brackets
（ ）+（ ）+（ ）+（ ）+（ ）+( )=51

（2 ）+（ 3）+（ 5）+（ 7）+（ 11）+(23 )=51
（2 ）+（ 3）+（ 5）+（ 17）+（ 11）+(13 )=51
There are many more ways to fill in

Put the proper prime number in the brackets
10=( )+( )=( )*( )=( )-( )
42=( )+( )
30=( )+( )=( )+( )=( )+( )

10=(3 )+(7 )=(2 )*(5 )=(13 )-(3 )
42=(23 )+(19 )
30=(13 )+(17 )=(11 )+(19 )=(23 )+(7 )

In triangle ABC, angle a is less than or equal to angle B, less than or equal to angle c, and 2 angle B = 5 angle a, find the value range of angle B

A+B+C=180
2B=5A
A

The rule change of verb past tense

① In general, add ed directly after the original verb
For example: wanted, played
② For verbs ending with the silent letter E, add D
Such as: hoped, live
③ To stress a closed syllable word, double write the last consonant and add ed. for example, stopped, shipped
④ Verbs ending with the consonant + y change y to I and add ed
For example: studied, worried
⑤ Some verbs do not conform to the above rules and need special memory
For example: am (is) - was, are were, go went, eat ate,
swim-swam,buy-bought,see-saw,
teach-taught,bring-brought,think-thought,
fall-fell,hurt-hurt,break-broke,win-won,
lose-lost

Basic structure of sliding rheostat
Sliding rheostat is made of large alloy wire, which is also called resistance wire

Sliding rheostat is made of alloy wire with large resistance, which is also called resistance wire

1、 Fill in the blanks
1. The series resonance occurs when the circuit with inductance and capacitance satisfies ()
2. There are two connection methods between three windings of three-phase power supply
3. When symmetrical three-phase power supply is star connected, the RMS of line voltage is () times of that of phase voltage
4. When symmetrical three-phase power supply is connected in triangle, RMS of line voltage () rms of phase voltage
5. The ratio of average power (active power) to apparent power is called ()
2、 Judgment questions
1. Active power in sinusoidal AC circuit refers to the power actually consumed by the circuit
2. The total response of a first-order circuit refers to the response of the circuit under DC excitation
3. In practical work, the neutral line is required to be grounded reliably. The function of the neutral line is to make the phase voltage of asymmetric load connected by star equal
4. The sequence of three-phase voltage reaching the maximum value (or zero value) in turn is called phase sequence. Generally, reverse sequence is adopted in engineering, and yellow, green and red colors are used to distinguish u, V and W phases
5. Harmonic analysis method is usually used to calculate nonsinusoidal periodic current circuit, which is based on the superposition principle of linear resistance
（ ）

The fifth one is: power factor. The first one is wrong. It should be when the input frequency is equal to the natural characteristic frequency
Judgment: right or wrong, use positive sequence in engineering

What are the requirements for English translation?

I'm not sure whether you want to be an interpreter or a translator. Interpreting requires good dictation, extensive knowledge and a solid foundation in English. Listening and speaking skills should be particularly outstanding, and then good psychological quality and reaction are also required. Finally, a little personal image is needed, too ugly is The basic skills of English can not be translated

English translation

What else
giraff /dgi'ra;f/

The angle between vector OA and ob is known, | OA | = 1, | ob | = 2, Op = TOA, OQ = (1-T) ob, and | PQ | is the minimum at t0

|The included angle of OP OQ is also OA, and the included angle of ob is set as; according to the cosine theorem t \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\t + 4 the equation is at (0,1 / 5)