Views on reading (100 words)

Views on reading (100 words)

What books give me is like another world. Where my feet can't reach. It brings my soul to appreciate. It gives me a different experience. Maybe we can't understand those profound metaphors of college students. But we can look at them from an ordinary perspective. Reading should be like eating rice. The body needs energy. Similarly, the soul needs food. Read more books, read good books, and become a teacher He is a man of double harvest

Please write your opinion on reading, about 50-100 words

Don't just read for the sake of reading, but also absorb the most nutrition from the reading process, and then accumulate and precipitate in your mind for your own use. Only in this way, the more books you read, the more knowledge you accumulate

About 50 words about Su Qin's reading

I don't like reading in the daytime, when I'm not sleepy, when I want to sleep most, I don't like reading anything, and I use extreme means to force myself to read

F (x) = 1 / 3x ^ 3 + (A / 2 + 1 / 2) x ^ + (2a-2) x has three different zeros
1. Find the value range of A
There must be a process

Firstly, the derivative of F (x) is obtained, Let f (x) = f '(x) = x ^ 2 + (4 / A + 1) x + (2a-2), that is, f (x) is a quadratic function of one variable; if f (x) has three different zeros, (1) the derivative f (x) of F (x) is required to have two zeros, that is, Δ > 0 of F (x), that is, Δ = (4 / A + 1) ^ 2-4 * 1 * (2a-2) > 0; (2) Let f (x) = 0 correspond to two X

Is the indicator light on the household plug-in (socket) led or neon bulb? Is it directly connected to the voltage of 220 V? Can it bear it? Remember that the limit voltage of the diode is 2 V
I removed a row plug (socket), why didn't I see a series resistor? Dizzy, really strange?

Most of them are light-emitting diodes (LEDs). Their working voltage is about 2V and the current is about 10mA. When they are connected to the 220V circuit, they will use resistance to divide the voltage. In this way, most of the voltage will be added to the resistance, and the resistance value is generally more than 10K

A / X-Y, B / 3y-3x, C / x ^ 2-2xy + y ^ 2

The simplest denominator of a / x-yb / 3y-3x = - B / 3 (X-Y) C / x ^ 2-2xy + y ^ 2 = C / (X-Y) (x + y) is: 3 (X-Y) (x + y) ‖ A / (X-Y) = 3A (x + y) / 3 (X-Y) (x + y) B / 3y-3x = - B / 3 (X-Y) = - B (x + y) / 3 (X-Y) (x + y) C / x ^ 2-2xy + y ^ 2 = C / (X-Y) (x + y) = 3C / 3 (X-Y) (x + y)

A power supply with voltage of 220 ∨ is used to supply power to an electric lamp marked pz220 --- 60 in a distant place. Due to resistance in the wire, the actual power consumed by the bulb is 55W
The power consumed by the conductor ()
A. Greater than 5W B. equal to 5W C. less than 5W D. uncertain

C

In the quadrilateral ABCD, if the external angle of ∠ A is 100 °, the external angle of ∠ B is 120 ° and the external angle of ∠ C is 60 °, then the degree of ∠ D is 0————

The sum of the external angles of the polygon = 360 °. D = 360 ° - 100 ° - 120 ° - 60 ° = 80 °

The voltage is 100V. The three resistors are 5, 10 and 15 ohm in parallel. What is the current of the main circuit

110 / 3a, let the total resistance be X
1 / x = 1 / 5 + 1 / 10 + 1 / 15, x = 30 / 11
I=U/R=110/3A

Page 50-52 (one variable linear equation and solution 1)
ditto

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