If there is no dust Read the answer, it is better to read the answer without dust

Attachment – Attachment Saturation – Fullness Sufficient.

Hygroscopic properties. Dust regulates the climate, and the weather is very different (if there is no dust in the air, everything on the ground will be wet. To make matters worse, there can be no clouds in the sky, no rain or snow to regulate the climate, and no water that evaporates from the ground to the sky can return to the ground.

If there is less and less water on the earth, and eventually it dries up completely, life will not be able to survive. In addition, due to the refraction of sunlight by these small water droplets, there will be natural scenery with thousands of meteorological conditions, such as sunset and sunset, idle clouds and fog, rainbow and sunset).

Through the action of dust, the text reveals a profound philosophy: things often have two sides, and only by correctly understanding them can we pursue the advantages and disadvantages and benefit mankind.

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Rely on fullness.

Features: Small, floating, hygroscopic, scattering light, lightweight, dense.

If there is no dust, there will be no sunset, idle clouds and mist, rainbow and sunshine.

It shows that everything often has two sides, and only by correctly understanding them can we pursue advantages and avoid disadvantages and benefit mankind.

I rely on it and am full.

Hygroscopicity, 1, water vapor in the air must adhere to the dust in order to condense into small water droplets.

2. When the water vapor in the air reaches saturation, the dispersed water vapor will adhere to the dust and form stable water droplets, which can float in the air for a long time.

3. If there is no dust in the air, everything on the ground will be wet.

1. The role of the paragraph in the text is:

3. Read the first paragraph intensively, and briefly talk about the specific performance of the "protective film" of dust.

Condensation nuclei are

5. Can the dotted "general" presumption in the paragraph be deleted? Tell us why.

1. The transitional role of connecting the previous and the next.

2. (1) Without dust, the light from the sun will not be reflected, scattered and refracted, and the earth will be pitch black.

2) Without dust, the temperature on the surface of the globe will be incredibly hot.

3) There is no dust, and the clouds in the sky are also very difficult to form.

4) Without dust, many harmful rays in the universe will enter the earth's surface unhindered and pose a deadly threat to humans and all living things.

3. (1) The combination of dust and water vapor becomes cloud droplets, which reflect a part of the solar radiation that hits them back to space. (2) Dust can absorb a part of radiant heat.

4. Condensation nucleus is a water droplet embryo formed by adsorbing water vapor on its own surface when the air and other hygroscopic particles such as dust and smoke particles reach a saturated state and the relative temperature reaches 300% 400%.

5. No, you can't. "General" indicates that the radius of the particles is usually between millimeters, and the deletion becomes a certain range within this range, which is too absolute, thus reflecting the accuracy of the explanatory language.

1.Appropriately fill in the words "scatter" and "reflection" in the horizontal line of the second natural paragraph.

a b 2.Second, what do the two dotted "they" in nature refer to?

they" means. they" means.

3.The order in which this article is explained is:

a.Chronological order bLogical order cSpatial order dSequence of procedures.

4.What is the method of explanation for each of the underlined sentences in the text?

5."Dust is mostly hygroscopic. This sentence is taken from the text, and you think it should be put back at the beginning of the paragraph?

A: 6Briefly use a set of analogies: "If there really were no dust in nature, what would be the situation for us?" ”

A: 7Can the dotted words be removed from the following sentences, and why?

Even some things that people regard as "waste" often have their existence value that cannot be ignored.

Reflection bScatter.

2.refers to "soil and rocks"; refers to "these and other organic particles." ”

4.Column numbers, compare 5Fifth natural paragraph.

6.If there is no dust in the atmosphere, the strong sunlight will make it impossible to open the eyes, if there is no dust in the atmosphere, the sky will become white, if there is no dust in the air, how monotonous nature is! If there were no dust in the air, everything on the ground would be wet, and if there was no dust in the air, there would be less and less water on the earth, and eventually it would dry up completely, and living things would not be able to survive.

7."Often" is the majority of the meaning in the text, and if "often" is deleted, it will become the meaning that all things that are regarded as waste have their existence value that cannot be ignored.

8.Everything has two sides.