Exam questions for junior high school questions questions for junior high school

I am now a first-year student at Zhuyuan Middle School, and I think that although Zhuyuan Middle School is not as famous as Shangwai and Puwai, it is still a very good middle school! The teachers and conditions are very good!

It's harder to do without a certificate. Some of the more excellent schools, such as the Shanghai Foreign High School and the First Girls' School, all require certificates to enroll students. Or check out schools that require interviews and written exams.

I'm going to be a senior student of the High School Attached to the Foreign University. It doesn't seem that you can come with a certificate, you still have to be recommended by the school, and the middle school thinks that your primary school is still very particular, and a better primary school is the best. Those who are qualified for the interview can participate in 3 interviews and 1 round of written test before they can come in.

It's strict, and of course, it's better if you have strong social backing. Because if you have one, you can come in any way you want to take the test. When I say social guanxi, I mean that it is very powerful, and you don't need to take out any general manager or anything, unless it is CNOOC or Baotou Steel.

To get back to the point, the award certificate is actually not the most important thing, he just gives you an interview qualification, and he is not sure whether he will be admitted or not. 3. After the interview, 2,000 elementary school students can stay 120, and then the written test will be divided into classes. Divided into 3 classes.

Class 3 is in the language of the school. If you come to the test, mathematics and foreign languages are the most important, for example, when it comes to the market, there is a math problem that makes 2 3-digit numbers together, so that you can do oral arithmetic. So it's hard.

Yes, but there is a certificate that will give priority to entry, I am now in the 6th grade, and the teacher told me that there are a lot of competitions in the past few months, as long as you know, you can sign up. Other awards are also available. As long as it's a certificate, it's fine.

Chuk Yuen Middle School! My alma mater is very good.

Good grades, plus class cadres are everything.

It's compulsory education.

So it shouldn't be so troublesome

No, it's that complicated.

Grades and scores are the most important thing.

Where are you, do you need a certificate or something to go to junior high school?

I don't know, there is such a rule, I haven't heard of it.

This is fine, too simple a question is not interesting at all.

Na and water react (to produce NaOH and hydrogen), resulting in a decrease in water in the tank and a drop in the liquid level.

There is a V discharge caused by air in the beaker, and the buoyancy is equal to the gravity in a suspended state. The water consumption of NA causes the liquid level of the sink to decrease, and the liquid pressure on the air in the beaker decreases, so that the air expands, the V row increases, and the buoyancy increases, but the gravity does not change.

The buoyancy force is greater than the gravitational force, so it rises.

Question: A small balloon is suspended in the beaker by a small lead block, add some water to the beaker, and the small lead block will gently poke the small balloon down, and the final position will be more than the original one.

Na reacts with water to produce new substances.

Na reacts with water to produce hydrogen. Hydrogen is lighter than air, giving the cup an upward force. I'm studying biology in college, that's what I guessed, I don't know the idea of junior high school.

There are 1+12 in the first row

There are 2+12 in the second row

There is N+12 in row n

All seats are available in the sum of all seats.

1+2+3...n+12n

n(n+1)/2 +12n

n^2/2 + 25n/2

Question 1: I don't know.

Question 2: Read as "minus three plus five plus minus seven plus two plus minus nine" or "minus three plus five minus seven plus two minus nine".

Question 3: 6-5-1=0

Question 4: 5000-9500-8000+25000-10250-2000=250

Question 5: 32-8-a-164=-18 a=-18+164+8+32=186x=

1.At least one is negative, at least one is positive, and the other is indefinite (can be positive, negative, can be 0).

2.Minus three plus five minus seven plus two minus nine.

2. Minus 3 plus 5 minus 7 plus 2 minus 9

4. 9500 5000 8000 25000 10250 2000 250 yuan.

6. (16 7 3 11) (1 2 + 1 3 + 5 6) = minus six and two-thirds.

The original price of the color TV is x, because the fine of 10 times is charged for each color TV, so the illegal income obtained after the price increase of each unit is 2700 10 = 270 yuan, and the illegal income obtained by the store after the price increase is x(1 + 80% -x = 270

x x + x x x - x = 270x( +1 )=270

x=270/

Solution: Set the original price of each color TV at X yuan.

Color TV is increased by 40% according to the original price, then the actual ** is x (1 + 40%) big reward, 20% off, then the actual sales ** is x (1 + 40%) * 80% per color TV income is x (1 + 40%) * 80% - x 10 times the illegal income of the store is fined 2700 yuan per store. Get the equation.

10[x(1+40%)*80%-x]=2700x(1+40%)*80%-x=270

x=27000/12

x=2250

Therefore, the original price of each color TV is 2250 yuan.

If 15 kg of brine contains x kg of salt, then the mixed salt is kg, and the concentration is (. ( and ( derive x= and x=3

At this time, the concentration of 15 kg of brine is 3 15 = 20%.

Therefore, the concentration of brine should be selected in the range of 10%-20%.

There is 5% salt water in 10 kg of solute is 10 times 5% = .

Let the solute in 15 kg be x

After solving x= by dividing by 15=10%.

The second formula is:

Solution: 3 divided by 15 = 20%.

So the concentration is 10-20%.

Solution: If the number of TVs sold in March is x and the selling price is y, then.

The **price of each unit is: y-y*20%=

The gross profit in March is: xy*20%=

The selling price in April is: (1-10%)y=

The number of products sold in April is: (1+120%)x=

Gross profit for April was:

So the ratio of the total gross profit in April to the total gross profit in March is:

A: The ratio of the total gross profit in April to the total gross profit in March is 11 10

3 minus y the absolute value of the socks plus x+y is equal to 0, so the absolute value of 3 minus y = 0;The absolute value of x+y = 0 (the absolute value must be greater than or equal to 0) so Zen excitation, y = 3, x = -3

So, x-y=-9 -6=3 2 xy