The spacious library seems a little crowded I'm in a hurry, fast!

The spacious library seems a little crowded I'm in a hurry, fast!

These two adjectives indicate two meanings. For example, "spacious" means that the library has a large capacity, can accommodate many people, and the reading environment is good. But "crowded" means that the number of readers exceeds the number of people that can be accommodated. Therefore, the use of these two words is accurate and objective

The rules of going to the library, at least five sentences
To use don't .

Don't speak loudly.
Don't eat or drink.
Don't write or draw on the desk.
Don't take the book home.
Don't leave rubbish.

There are many reading rooms in the library?
Is it "inside"?

It's inside
There are many reading rooms in the library
There is a reading room inside

After the decimal point of a decimal is moved two places to the left, it is 30.888 less than the original number, and the original decimal is ()

30.888/（100-1）=0.312
The original decimal is: 0.312x100 = 31.2

From a to B, it takes 10 hours for car a and 15 hours for car B. the two cars leave from a and B at the same time. When they meet, car a travels 80 kilometers more than car B, and a and B travel 80 kilometers more
How many kilometers are there from each other?

80/(1/10-1/15)
=80/（1/30）
=2400km

In △ ABC, the equation (1 + x2) Sina + 2xsinb + (1-x2) sinc = 0 has two unequal real roots, then a is ()
A. Acute angle B. right angle C. obtuse angle D. nonexistence

In △ ABC, the equation (1 + x2) Sina + 2xsinb + (1-x2) sinc = 0 has two unequal real roots, that is, (Sina sinc) x2 + 2sinb x + (Sina + sinc) = 0 has two unequal real roots, and △ = 4sin2b-4 (sin2a-sin2c) > 0

The length of the road between a and B is 360 kilometers. A car goes from a to B and leaves B after 3 hours
one

The distance between a and B is 360 kilometers. A car has driven from a to B for 3 hours, and 105 kilometers away from B. how many kilometers does this car travel in an hour?
(360-105) / 3 = 85 km / h

If 1 / X-1 / y = 2, then the value of fraction XY / (x2-y2) is

Can't find out
1/x-1/y=(y-x)/xy=2
y-x=2xy
Primitive = - XY / (y + x) (Y-X)
=-xy/(2xy)(y+x)
=-1/(2y+2x)

A and B vehicles are facing each other from ab. it takes 6 hours for a vehicle to complete the whole journey, and it takes 8 hours for B vehicle to complete the whole journey. When they meet, the distance between AB and ab is 25 meters from the center point

The speed of car a is 1 / 10
The speed of car B is 1 / 8
The speed sum of the two cars is: 1 / 10 + 1 / 8 = 7 / 24
Meeting time: 1 / (7 / 24) = 24 / 7
Car a left: (42 / 7) * (1 / 6) = 4 / 7
Whole course: 25 / (4 / 7-1 / 2) = 350

Let f (x) be a function defined on R, and for any x.y ∈ R, f (x + y) = f (x) f (y), and if x > 0, f (x) > 1
(1) When f (0) = 1, and X

F (0) = f (x) + F (- x), because when x > 0, f (x) > 1, f (0) = 1