Environment includes both in the air, water, land, plants, animals, etc for the content of the material factors, including such as idea, system, the code of conduct for content of non-material factors; Both natural factors and social factors; Both the life form, also include the life forms...
What is air? It has no colour, smell or taste. We can feel it. When it moves, it becomes wind. Air is important to the world. People need it. Animals need it. Plants need it too. So we must keep the air clean and fresh. Don't smoke. Don't drive to school or work if you...
Air pollution occurs when gases, dust particles, fumes (smoke), or odors are introduced into the atmosphere in a way that makes it harmful to humans, animals, and plants. Air pollution results in the air being dirty (contaminated, unclean, and often toxic). The Earth is surrounded by a b...
Environment includes both in the air, water, land, plants, animals, etc for the content of the material factors, including such as idea, system, the code of conduct for content of non-material factors; Both natural factors and social factors; Both the life form, also include the life ...
have recently gained recognition as pollutants by some scientists. Others recognize the gas as being essential to life and therefore incapable of being classed as a pollutant.参考:Air pollution is a chemical physical (e.g. particulate matter)or biological agent that modifies the natural ...
The AirAir is very important to us.We can breath and live with air.But the air in our city is dirty now.Cars,people's activities and other reasons make the air dirty.So weshouldoften go out by bus.We should drive less.We can also plant more trees to make our air clean.空气空气对...
The environment’s non-living part The non-living part consists of: The atmosphere There is a layer of oxygen, nitrogen, carbon dioxide, and other gases that surround the Earth which we call the atmosphere, i.e., the air. The hydrosphere ...
An AQI value of 50 or below is classified as "good air quality," according to health experts. Once the AQI index reaches 100 or above is when the air quality is considered unhealthy and may impact certain groups of people.The Air Quality Index displayed on AirNow.gov shows the ...
1. 疑问句中,be动词要放在主语之前,所以is应该放在主语you之前,句子应该改为What nationality are you? 2. air hostess是以元音音素开头的单词,所以应该用an修饰,句子应该改为I'm an air hostess. 3. job是可数名词单数,应该用what is your job提问。 4. milkman是可数名词单数,前面应该加a,句子应该改为I'...
一、由感叹词what引导的感叹句。1.① What+a/an+（形容词）+单数可数名词+主语+谓语！② What+名词词组+主语+谓语！如: What a fine day it is!2. What+(形容词）+可数名词复数或不可数名词+主语+谓语!如: What kind women they are!What nice music it is!二、由How引导的感叹句。（...