Who will help you with the questions for the next year of junior high school? How do I do this quest

Fill in the blank 1When measuring the volume of a regular-shaped object (such as the volume of a container), you can first measure its length, width and height with a scale, and then calculate its volume by substituting the measured data for a formula. If the length, width, and height of a wooden box are meters, meters, and meters respectively, then its volume is ( ) cubic meters.

2.When measuring the volume of irregular objects with a graduated cylinder and water, it is necessary to fill the measuring cylinder with an appropriate amount of water in advance, and the requirement for "appropriate amount" is (not too much submerged object).

3.When measuring the volume with a graduated cylinder, if you look down at the reading, the reading result is larger than the actual volume (larger), and if you look up at the reading, the reading result is smaller than the actual volume (smaller).

4.The statue of Zheng Chenggong on Gulangyu Island is meters high and is composed of 625 pieces of "Quanzhou White" granite carvings on 23 floors. Give you a scaled-down model of the statue of Zheng Chenggong in Gulangyu, the size of which can be put into a graduated cylinder, and also give you a piece of "Quanzhou White" granite, please complete the following experimental steps:

Use equipment (pallet balance) to measure the quality of small granite.

Use a graduated cylinder and an appropriate amount of water to measure the (volume) of small granite.

Use equipment (scale) to measure the height of Zheng Chenggong's statue model.

Use equipment (graduated cylinder, water) to measure the volume of Zheng Chenggong's statue model.

The scale should be able to submerge the measured object below the full scale of the water on the large or small scale.

The volume scale is not known.

The probability that no one wins the lottery = the probability that 5 people will not win = 7 10 * 6 9 * 5 8 * 4 7 * 3 6 = 1 12

Pick D. Agree.

If you pass the Olympiad in elementary school, you can easily do the combination of numbers.

You look at ** understand it, don't understand it and ask me.

On the diagram, the opposite corner of the staring feast roll 1 is recorded as 4, and the solution: 1= 4, 1= 3, 4= 3 (equal substitution), a b (isotope angle Xiangxiang, etc., two straight lines are parallel).

2+ 4=180°, 2+ 3=180°, 4= 3 (equal complementary angles of the same angle), a b (equal isotope angles, two straight lines parallel).

With 5cm as the centerline, Chunsheng s= *12 2) 2=36

With type 12 as the center line, s= *5 2) 晌老 2=

The right-angled three-plex megagonal determines the right-angled edge: the square of a + the square of b = the square of c.

5 squared + 12 squared = 13 flat infiltration let the tenant.

So 5 and 12 are two right-angled sides.

The bottom area of the cone may be 、Slip in two cases:

x = 25 squared

x = 144

1、 3（1/2-3/4）-2（1/4-1）=-3/4+6/4

The first question is equal to three-quarters.

The first question is:

The second lane is -12

It's very simple, are you a first-year junior high school student, you have to think carefully, don't look it up online whenever you have a problem.

x celery does not mess with -2x-2=0

then x -2x = 2

Original = x -2x + 1 + x -9 + x -4x + 33x -6x-5

3 (x - 2x) - 5

The value obtained by solving a quadratic equation is substituted into the simplified formula