Why is mineral water 18.9 liters?

Why is mineral water 18.9 liters?

1. Matching with water dispenser
2. It matches the weight that people can bear when changing water
3. Matching with water delivery workers' transportation and handling
4. From a bucket of water can be drunk within the shelf life match

How many liters is 20 tons of water

20 tons of water is 20000 kg of water
According to the calculation of pure water, the density is 1kg / m3
So the volume is 20000 cubic meters
One cubic meter is 1000 liters
20000 cubic meters is 20000000 liters

4 tons of water is 20% less than () tons of water

4 tons of water is 20% less than (5) tons of water

The purchase price of a commodity is 2000 yuan, and the price is 2800 yuan. How much discount can the commodity get a 12% profit margin?

Let's suppose that we can get a 12% profit margin with a discount of X. according to the meaning of the question, we can get the following result: 2800 × x10-2000 = 2000 × 12%, and the solution is: x = 8. A: we can get a 12% profit margin with a discount of 8

Subtract the product of 3.5 and 4 from a number, and the difference is 5.7______ ．

3.5 × 4 + 5.7, = 14 + 5.7, = 19.7; answer: this number is 19.7

When they went shopping, they called on their friends' house
When they went shopping ,they _____ _____ their fuiend's home

came by

There are a series of regular numbers: 1, 1, 2, 3, 5, 8, 13, 21, 34 How many odd numbers are there in the top 50 of the string?

Notice that there are two odd numbers for every three numbers
So there were 34 odd numbers

I write a letter to my friend every two weeks

I write to my friend every two weeks.

There's a string of numbers 1, 1, 2, 3, 5, 8, 13, 21, 34, 55 Are there () odd numbers in the first 100?
As the title

This sequence is the famous Fibonacci sequence, and its rule is that from the third number, any number is the sum of the first two numbers. Parity analysis shows that because the odd number plus the odd number is even, the even number plus the even number is even, the odd number plus the even number is odd. The first two numbers are odd, so the third is even; so the fourth is odd; the fifth is also

English translation

My familyI have a happy family.There are three people in my family.They are my father,my mother and I.My father is a teacher,and my mother is a teacher, too.But they don't work in the same school.They ...