What's wrong with this English sentence? British Airways is one of the busiest international airline.

What's wrong with this English sentence? British Airways is one of the busiest international airline.

airline->airlines.
One of with countable plural

Correction of errors in English sentences
①、Just stay on bed and T"ii telephone the doctor.
②、You"d better to go to the hospital.
③、How many fishes can you see in the river?
④、Summer begin in june.
⑤、Look!The girl is make a snowman.
Hoo hoo, it's over at last Help me find the wrong place, the best It's better to say why you're wrong, even if you can't say it all, then I'll thank you all
Let's talk first
It's better to say the wrong word and the whole sentence.

To you'd better do something 3. Fish to fish when fish are swimming in the river. Fish to be counted when fish become a delicacy on the table

Given that A-B is equal to 3 and ab is equal to - 1, find the algebraic formula AB ^ 2-A ^ 2B

The original formula = - AB (a-b)
=-(-1)*3
=3

If the perimeter of a right triangle is √ 2 + 1, the maximum area is? The answer is 1 / 4,

Let two right angle sides be a and B
Then a + B + √ (a ^ 2 + B ^ 2) = √ 2 + 1
a+b≥2√(ab),√(a^2+b^2)≥√(2ab)
So √ 2 + 1 ≥ 2 √ (AB) + √ (2Ab) = (2 + √ 2) √ (AB)
Then √ (AB) ≤ (√ 2 + 1) / (2 + √ 2) = 1 / √ 2 = √ 2 / 2
So ab ≤ 1 / 2
That is, the area s = AB / 2 ≤ 1 / 4
The maximum value is obtained if and only if a = b = √ 2 / 2
If you don't understand, please hi me, I wish you a happy study!

How many meters is one foot two

1 Zhang = 10 feet
1 foot = 10 inches
1 meter = 3 feet
One foot two = 12 feet = 4 meters

The original rectangular playground of the school is 80 meters long and 75 meters wide. After the new school building is built, the length will be reduced by 20 meters. How many meters should the width be increased to make the playground as big as the original one?

（75+x）*(80-20)=80*75
75+x*60=6000
75+x=6000%60
x=100-75
x=25
(Note: * = multiplication sign,% = division sign)

In an acute triangle, the sum of the degrees of any two internal angles a is greater than 90 degrees B is less than 90 degrees C is equal to 90 degrees

In an acute triangle, the sum of the degrees a of any two internal angles is greater than 90 degrees B

If x > y, compare the formula 2x + y with x + 2Y

Difference method
Difference = 2x + Y - (x + 2Y)
=2x+y-x-2y
=2(x-y)+y-x
=2(x-y)-(x-y)
=x-y
x＞y
Difference > 0
Then 2x + Y > x + 2Y

The school basketball court is 40 meters long and 24 meters wide. Now we need to be around the basketball court and at the four corners. The distance between two adjacent flagpoles should be equal. How many flagpoles should we insert?

This problem has infinite solution, as long as it can be divided by 40 and 24 at the same time, it can be used as the distance between flagpoles
I think the question should be at least how many flagpoles should be inserted?
The greatest common divisor of 40 and 24 is 8
40÷8=5
24÷8=3
5+3=8
8x2 = 16
A: at least 16 flagpoles should be inserted

Third grade primary school English questions
1. These bicycles are super
this （）（）super
2. It is hot
it （）（）
Is this your ruler
（）（）your ruler
4. L like ladies
l （）（）ladybirds
5. It's soft
how （）it（）?

1,bicycle is
2,isn't cold
3,this is
4,don‘t like
5,does feel