The bird's password 600字高中英语作文

　　When there is a bird in the shell to learn the family's password, wrong, there is no food.

　　South Africa's east coast grows a local plant, called the pink flowers. As the name suggests, this kind of plant is pink petals, looks like a rose, so also known as the sea rose. The sea rose flower is yellow, very bright, but looked very full. Stamens of stigma, in fact, it is also true that with pollen, it should be the insects that feed on the pollen's favorite.

　　However, carefully study the flower, you will find that they actually tightly intertwined, forming a knot, almost can't open it, without external force to the inside of the pollen. Because of this reason, off the coast of South Africa's most insects do not patronize the sea rose, only except wood bees, they landed on the sea roses, after the open wings to tighten, then forced vibration, strange to say, when they do, profoundly intertwined with the original of the blossom will burst open and hides the stigma pollen may also be sprayed, for wood bees to enjoy.

　　So, what is how to fool some Jin Juan Jiao warbler's? Professor Karen madoff found that Jin Juan young wu is a thief, they have kept demo different cries, if lucky guess, they will be successful.

Black's black what?

　　What in the world the most dark? You may say, this problem some absurd, because black is black, shallow black is grey, what is the most black? In fact you are wrong! Because in the eyes of scientists, and there are black and dark. Such as black carbon, or be artificial black paint coat, the black can absorb visible light, but it can't absorb infrared and ultraviolet ray, so use infrared telescopes can see them. But there is a kind of material, infrared telescopes can't see it, because it absorbs the infrared rays, ultra-violet rays all, didn't reflect any frequencies of light, and because of that, this kind of material in the human eye, even sensitive viewer, it seems, is black, and it is the black thing in the world at present.

　　Of course, this HeiCaiLiao is not natural, but American scientists developed a kind of special material. Experiments confirm that this material can absorb 99.5% uv, visible and infrared light. Although there is also a performance before a near perfect absorption of light material, but the material is only valid absorb ultraviolet and visible light band, compared with the new material 'nearly 100 times better. New materials while unique role, but its structure is not very mysterious, it is actually a kind of pure carbon hollow tubular body, the thickness is one over ten thousand of the diameter of a human hair. They themselves have adsorption, can be attached to the vertical surface of different material, like the carpet of hair can be attached to the vertical on the carpet. If them daub on the surface of silicon, titanium and stainless steel, so the material becomes the most black thing in the world.