Excuse me: the English abbreviations "ad", "BC" and "CBA"

Ad ad
BC BC
CBA China Basketball Association
HD hard disk or high density

A knife and fork

knife and fork

If the numerator of the fraction 9 / 11 is added with 45, if the value of 10 is still equal to 9 / 11, how much is the denominator added? Why?

Add 45 to 54, which is 9 × 6
The numerator expands 6 times, and the denominator also expands 6 times, that is to say, it becomes 11 × 6 = 66, a considerable increase of 66-11 = 55
If you understand and solve your problem,

When does the plural form add s? When does the plural form add es? When does the plural form add ies?

This is very good,

X + Y / 2 + X-Y / 2 = 6 2 (x + y) - 3x + 3Y = 24

x+y/2+ x-y/2=6
(x+y+x-y)/2=6
x=6
Substituting 2 (x + y) - 3x + 3Y = 24
2x+2y-3x+3y=24
5y-x=24
5y-6=24
5y=30
y=6
So x = 6, y = 6

Translate the following phrases between English and Chinese
1. Fill in_____ 2. Make progress
3. Tourist attractions 4.take part in_
5.take place_____

1. Fill in 2. Make progress
3. Tourist attractions 4. Take part in
5. Take place

In △ ABC, ad: DB = 2:1, be: EC = 3:1, CF: FA = 4:1, then △ DEF is a fraction of the area of △ ABC?

As shown in the figure, make Ag ⊥ BC, DH ⊥ BC, because ad: DB = 2:1, so DH: Ag = BD: ab = 1:3, because be: EC = 3:1, that is, be: BC = 3:4, so s △ bed: s △ ABC = 1:4, similarly, we can get s △ CFE: s △ ABC = 1:5, s △ AFD: s △ ABC = 2:15, so s △ def = (1-14-15-215

Is the predicate verb after he as well as his family singular or plural

Singular number
A as well as B
It's up to a, not b
A is he, so it's singular

In the triangle ABC, ab = 15, AC = 13, BC = 14, find the area of the triangle ABC
Is the area one or two?

Let AB = C = 15, AC = b = 13, BC = a = 14, P = (a + B + C) / 2 = 21,
S△ABC=√p(p-a)(p-b)(p-c)=√(21*6*8*7)=84.
There is only one area value

Put I seeds. A into smoe pot
Some has the wrong number

I put some seeds into a pot.
I plant some seeds in a flowerpot

Excuse me: the English abbreviations "ad", "BC" and "CBA"