What is the present participle form of nod

What is the present participle form of nod

nodding

The past tense of smilie, nod, shake, Hu, kiss, bow

mile,smiling,smile
nod,nodding,nodded
hug,huging,hugged
kiss,kissing,kissed
bow,bowing,bow

If the quadratic + 2 (M-3) + 16 of X is a complete square of X, then M=

The quadratic + 2 (M-3) x + 16 of X is the complete square of X
2(m-3)=±2×4
m-3=±4
M = 7 or M = - 1

As shown in the figure, in △ ABC, ad is the median line on the edge of BC, e is the midpoint of AD, connecting be and extending AC to point F, DG is the median line of △ BCF

Certification:
∵ DG is the median of △ BCF
∴DG＝1/2FC,DG∥AC
∴∠CAD＝∠GDA,∠AFE＝∠DGE
∵ e is the midpoint of AD
∴AE＝DE
∴△AFE≌△DGE （AAS）
∴AF＝DG
∴AF＝1/2FC

What is the single digit of the power of 2?

2 ^ 1 bits is 2
2 ^ 2 bits is 4
2 ^ 3 bits is 8
2 ^ 4 bits is 6
2 ^ 5 bits is 2
……
So every four of you follow the bad rules
April 1999
SO 2 ^ 1999 bits is 8

The weight of 120 copper wire nose

About 50g

{2x+y+3z=13,4x+2y+z=11,6x+y+4z=20}
Need process

2x+y+3z=13 (1)
4x+2y+z=11 (2)
6x+y+4z=20 (3)
(1)×2-(2)
6z-z=26-11
5z=15
z=3
(3)-(1)
4x+z=7 (4)
x=(7-z)/4=1
y=13-2x-3z=2
So x = 1, y = 2, z = 3

Can the temperature control switch be used in the main circuit? In a heating circuit, the voltage is 220V, the current is 2a, and the temperature control switch is 250V, 5A. Is it OK?

The rated voltage and current of temperature control switch is 250V, 5A. The rated voltage and current of heater is 220V, 2A. It can be used safely

Is (A-1) / (a + 1) a fraction

Yes

If two light bulbs with 220 V and 40 W are connected in series, what is the total power consumption

U2/P=R
Calculate the resistance of each 1210 ohm
220 V / (1210 + 1210) Ω = 1 / 11A
Then p = IU is used to calculate the actual total power
If you want to calculate each, divide by 2
The solution is 10W per city
Total 20W