Take a look at 50 for urgent questions and take a look at urgent questions

Dude, if anyone else is in the same situation as you, it's network congestion, I remember when I used to be in college, the course selection system was like that...

You can set this address as a trusted site, reduce the security of your browser, and Tools-Internet Option.

It should be that the system is too crowded.

I guess it may be a problem with your school system, and it's being maintained.

It may be a machine problem, try to change the machine or change the network environment, and there is also the firewall settings and network settings to see if there are any restrictions.

A person's actual talent is n, and his own estimate of his own talent is m

Because n is a fixed value, the greater his own estimation of himself, the smaller the value derived from this score.

With the numerator constant, the larger the denominator, the smaller the fractional value. The higher a person's estimation of himself, the more conceited he is, and even if his talent is higher, his overall score will drop because of the large denominator.

To put it simply, people should not overestimate their abilities.

The higher a person's estimation of himself, the more likely he is to become complacent, and the less likely it is to make progress and make achievements.

These are not executable files and cannot be run, I have tried to fix them with the failover console, but I don't know if it will work under win7. The specific method is that after you install the failover console with the original installation disk, enter the console and run the fixboot command.

This definitely doesn't work, and the boot of XP is not added to the master boot record.

Dew from tonight white"It not only writes the scene, but also points out the season. On the night of the White Dew Festival, the dew is clear and chilling. "

The moon is the hometown of Ming"It is also a scene, but what the author writes is not completely an objective reality, but incorporates his own subjective feelings.

Obviously there is a bright moon in the whole world, there is no difference, but I want to say that the moon in my hometown is the brightest: it is obviously my own psychological hallucination, but I want to say it so certainly, there is no doubt. However, this method of using this late illusion as truth does not make people feel unreasonable, because it is an extremely profound expression of the author's subtle psychology and highlights his feelings for his hometown.

It is precisely because it stimulates the resonance of the preparation for reform in people's hearts that this poem has become a famous sentence that has been praised through the ages.

(1) Answer: Set up the purchase of X toys of type A, Y toys of type B, and z toys of type C.

x+y+z=50

21x+15y+25z=900

When only goods of type B and C are purchased, x=0

then y+z=50

15y+25z=900

y=35z=15

When only A and C goods are purchased, y=0

then x+z=50

21x+15y=900

x=y=y cannot be negative, so this result is not valid.

When only goods of type A and type B are purchased, z=0

then x+y=50

21x+15y=900

Get x=25y=25

Therefore, there are two ways to purchase, 35 pieces of type B goods and 15 pieces of type C goods are purchased; or 25 pieces of Category A and 25 pieces of Category B.

2) The profit of the first scheme is: 35 * 8 + 15 * 12 = 460 yuan, and the profit of the second scheme is: 25 * 10 + 25 * 8 = 450 yuan, and the profit of the first scheme is larger, so the first purchase plan is adopted.

The first thing to do is to make it clear what the author's intention in writing this article is. Judging by the author's expression, what this article is about is the author's dissatisfaction with the social state at that time.

Belikov represents the image of many people in society at that time, and the reason why these people are like that is due to the oppressive, dull, and stagnant social environment of the time. As long as this society remains in such a state of lifelessness, these people have no hope of change.

Then it comes back to the author's intention, which is to awaken those who are not numb through this depressing and somewhat tragic description, to overthrow the old society and establish a society with a new spiritual outlook.