Character: Students A, B, C and D (male or female, A is the president of the class science association; The other three represent a project team as the team leader).
(A first, then B, C and D)
A: (Playing with a paper tube or notebook in his hand) There was no ostentation and extravagance on the stage, no shouting, no clapping, and I was just putting on a show. I am the president of the class science association who cares about the country and people, environmental protection and health. Everyone often sees a public service advertisement made by Jackie Chan on TV: "No business, no killing." He warned us that the living environment of animals and plants on the earth, as well as our human living environment, has been seriously damaged. (The following words are slowly lyrical) "I am worried about seeing these. I wish I had the hands of two gods to restore the deforested forest vegetation, but unfortunately I don't. I want to order to stop all bad behaviors that endanger the living environment, but unfortunately I don't have that authority and appeal. "
When I am confused, I think of a famous teacher's famous saying: You must be good at studying small things around you to grasp the steering wheel of big things.
So, I organized and established the class "Science Popularization and Environmental Protection Association". There are three research groups. We will call a meeting of our project team leaders and report to you later. Look, that's impossible.
B: (walking onto the stage with a small plastic flowerpot in his hand) The president informed me to come to the meeting. I'm ready. The key research topic is plants, and the first research is flowers.
C: (Playing with the prop mantis model) The key problem is insects. First, we should study the characteristics and habits of mantis, and pay attention to common sense. Mantis has made great contributions.
D: (wearing gloves and holding a small trash can) Low-carbon hygiene is the most popular. The key to tackling the problem lies in people, living conditions, food, clothing, housing and transportation, and everything is meaningful.
Ok, all the project leaders are here. Let's have a meeting to report on the progress and application of key research projects of each research group. Who will be the first to speak?
B: Let's stick to the collar and report in sequence.
Yes, you can go first.
B: Green plants are human air purifiers, and flowers are the vanguard of purifiers.
C: Just like our young pioneers!
B: Research shows that flowers generally have the functions of beautifying the environment, pleasing people, nourishing temperament, increasing happiness, stimulating excitement and relieving stress.
I tell you, people are happy at the sight of flowers.
A: Otherwise, all patients will send flowers!
Research shows that.
C: Stop, stop, I said, why do you always study? Is it because the old goat wears glasses and pretends to be an old pedant?
D: We can't study such a profound problem. Let him continue his speech.
B: (deliberately raising his voice) Research shows that some fine flowers are not only pleasing to the eye, but also have the functions of anti-pollution, detoxification and radiation protection.
C and D: Ah! (surprised)
Let him talk.
B: Chlorophytum, for example, kills harmful bacteria in the air and swallows carbon monoxide. Ivy absorbs benzene and formaldehyde, and Araceae absorbs harmful gases such as benzene and trichloroethylene. Aloe vera, Eupatorium odoratum, Eupatorium odoratum and Dendrocalamus giganteus are called natural scavengers for absorbing formaldehyde. Especially cactus absorbs electromagnetic waves and resists radiation.
Ding Bing: (Shouting together) It's amazing!
Do your group have any specific practical activities?
B: Yes, we first arranged a radiation-proof cactus for the school computer room. Put more anti-pollution flowers in the classroom corridor. Our group carried out publicity in several communities to help gardeners grow flowers. Every family in my group has anti-pollution flowers. Come to my house and have a look. My house is like a small flower cellar.
A: ok, it's very rewarding. We'll talk about it in the second research group.
C: Speaking of insects, there are hundreds of millions of species. Who has the ability to study them? We studied a species-mantis.
You are not interested in mantis boxing!
C: The horse's ass was nailed with an iron palm, but you didn't get a hoof. Coincidentally, on Sunday, some of our friends went to the countryside to catch grasshoppers and found a big mantis. Kick your legs (learn to move), jump forward and eat a mung bean fly (learn to move your mouth). So we secretly observed that it ate a few flies and moths in a few minutes. Later, we all agreed that no one should kill it and we should study it.
A: You are good at finding problems, which is very interesting. Tell me more.
C: mantis is also commonly known as knife mantis.
(Learn two songs sung by Dao Lang) Dao Lang is an old singer!
Don't interrupt me, okay? Singer Dao Lang is still alive. This knife beetle is a medium to large invertebrate insect.
Observations show that there are more than 50 species of mantis in China, which belong to carnivorous insects and basically feed on organisms. Because its front legs and tibial joints have sickle-shaped teeth, it is fearless of ordinary pests. It only takes 0.08 seconds to complete the capture action.
A: Too soon. No wonder he became a natural enemy of pests.
C: Observations show that mantis specializes in pests on agriculture, forests, fruit trees and ornamental plants, and more than 40 kinds of pests such as flies, mosquitoes, migratory locusts, moths, vegetables and corn stalks are its delicacies.
B: otherwise, call the magic knife catcher!
D: I don't think it's necessary to spray pesticides if you keep more mantis, and you don't have to worry about pesticide residues when you eat vegetables and fruits.
C: Yes, our group and the science teacher, Mr. Liu, have established a mantis breeding experimental field, which is going to be widely used in rural areas to prevent and control agricultural and forestry pests.
If this experiment is successful, your contribution will be too great.
C: Yes, I also think it's time for me to make a contribution.
Your work is so exciting. It's time for the third team to report
D: Our topic is too big. We should study one thing, that is, people's habits of low-carbon and environmental protection. It is observed that a good environment is created by people, and a bad environment is not improved or destroyed by people.
B: Great.
C: High praise.
So, we conducted a social survey. People's understanding and behavior on low-carbon environmental protection can be divided into several types.
What type are they?