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1, an object is at rest for 0 meters, rising for 7 meters is () meters, and falling for 3 meters is () meters.

2. If y= 15x, then X and Y are in direct proportion ().

3. In a proportion, two external terms are reciprocal, one is 5 and the other is ().

4, the area of the triangle is certain, and the bottom is directly proportional to the height (); The height of the cone is constant, and the volume is proportional to the bottom area ().

5. Draw a distance of 15km on the map with a 3cm line segment, and the scale of this map is (); On the map with the scale of 1∶2000, the line segment of 6 cm represents the actual distance () meters, and the actual distance 180 meters should be drawn () centimeters on the map.

6. The diameter of the bottom of the cylinder is 4 decimeters, the height is 0.5 decimeters, and its side area is () square decimeters; Its surface area is () square decimeter; Its volume is () cubic decimeter.

7. The radius of the bottom of the cylinder is 2 cm, the height is 3 cm, and the volume of the cylinder is () cubic cm.

8. When the side of the cylinder is unfolded, it is a square with a side length of 12.56 cm, and the diameter of the bottom of the cylinder is () cm.

9. The volume difference between a cone and a cylinder with the same height as its bottom surface is 30 cubic centimeters. The volume of this cone is () cubic centimeters.

10, the volume of cylinder is 12 cubic decimeter, and the volume of cylinder with equal bottom and equal height is () cubic decimeter.

1 Second, choose carefully and sit in the right place. (10)

1, if 3a=4b, then a: b = ().

①3∶4 ②4∶3 ③3a∶4b

2. The flight speed and time of a passenger plane from Beijing to Shanghai ().

① Direct ratio ② Inverse ratio ③ Out of proportion.

On the number axis, the number on the left must be the number on the right.

① greater than ② less than ③. be equal to

4. On a map, the actual distance of 30 kilometers is represented by a line segment of 20 cm, so the scale of this map is ().

① 1∶ 1500 ② 1∶ 15000 ③ 1∶ 150000 ④ 1∶ 1500000

5. The volume of a cylinder is constant, and its height is inversely proportional to ().

① Bottom radius ② Bottom area ③ Bottom circumference ④ Bottom diameter

6. Two ratios in the following group () cannot form a ratio.

① 7:8 and 14: 16 ②0.6:0.2 and 3:1③19:10 and 10:9.

7. The radius of the bottom surface of the cylinder is enlarged by 3 times, the height is unchanged, and the volume is enlarged ().

①3 times, ②9 times, ③6 times.

8, a cylindrical chimney, the bottom diameter of 20 cm, high 1 m, its surface area is () square centimeters.

①6280 ②628 ③62.8

9. Knead a cylindrical plasticine into a cone with the same bottom, and lift it ().

① Zoom in 3 times; (2) 3 times smaller; ③ Magnify 6 times; (4) reduced by 6 times.

10. On a map with a scale of 200: 1, the length of a part is 2 cm, and this part is actually long.

① 4m ② 1m ③ 0. 1mm ④ 0.4mm。

Third, carefully scrutinize and be a good referee. (10)

1, the number of copies subscribed to> is out of proportion to the amount of money. ()

The area of a square is proportional to the length of its sides. ()

3. The number of days is fixed, and the daily coal consumption is inversely proportional to the total coal consumption. ()

It is easy to see the quantity from the histogram.

5. The formula consisting of two ratios is called proportion. ( )

6. If 8A = 9B, then b: a = 8: 9 ()

7. The energy composition ratios of 15: 16 and 5: 6. ( )

8. The volume ratio of cylinder to cone is 3∶ 1. ( )

9. When the height of a cylinder is doubled, its volume is doubled. ( )

10. The volume of the cone is 24 cubic centimeters, the height is 4 centimeters, and the bottom area is 18 square centimeters. ( )

Fourth, carefully examine the questions and calculate them carefully.

1, solution ratio. (16)

⑴ x∶3.5= 1.4∶5.6 ⑵ =

⑶ :4=x : ⑷ :x= :2

5. Go into life and solve problems. (32 points)

1. The following is a fan-shaped statistical chart of the number of apples, bananas and oranges brought in by Qiushi Fruit Store.

These three fruits * * * are transported into 4800 kg, and the weight of three kinds of water is calculated according to the above figure.

The house should be paved with square bricks. It needs 96 square bricks with an area of 9 square decimeters. If you use a square brick with a side length of 4 meters, how many pieces do you need? (Use proportional solution)

3. There are 10 columns in a conference hall with a base diameter of 0.6 m and a height of 6 m.. Now it needs painting, 0.5 kilograms of paint per square meter. How many kilograms of paint does it take to paint these columns?

4. Make a cylindrical iron drum with a height of 45 decimeters and a bottom circumference of 37.68 decimeters. How many square decimetres of iron sheet do you need? (approximate by one, the number remains an integer)

5. A cylindrical reservoir with a bottom circumference of 365,438+0.4m and a depth of 2.4m measured from the inside, and its inner wall and bottom are coated with cement.

(1) What is the plastering area?

How many tons of water can this reservoir hold? (weight of water per cubic meter is 1 ton)