题型:阅读理解 题类:常考题 难易度:普通
Archerfish(射水鱼), a species famous for spitting (吐) water to shoot insects out of the air, can recognize one human face from another.
In the laboratory, instead of shooting insects, the fish were taught to spit at pictures of human faces showed on a computer screen outside their aquarium. The fish were first introduced to two faces, and taught to spit at one of them in exchange for a food reward. The researchers then tested whether the fish would recognize and spit at the face they had learned from among 44 new ones. And they were right more than 80% of the time.
To the researchers' surprise, even when they did that with faces that were in black and white, the fish were still able to find the face they were trained to recognize.
Telling one human face from another is a surprisingly difficult task. As we all have two eyes above a nose and a mouth, doing so depends on recognizing some extremely small differences.
“It has been supposed that this task is so difficult that it can only be completed by higher animals, which have a large and complex brain,” said Newport, whose study was published in the journal Scientific Reports. “But the archerfish were able to do this without having a neocortex, the most recently developed part of the brain. In humans, the neocortex governs our sense and language.”
“Fish have a simpler brain than humans and they don't have the section of the brain that humans use for recognizing faces,” Newport said. “Even though, many fish show amazing visual (视力的) behaviors and therefore make the perfect subjects to test whether simple brains can complete complex tasks.”
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E-Learning: An Alternative Learning Opportunity |
Day school Program Secondary students across Toronto District School Board(TDSB) are invited to take one or two e-Learning courses on their day school timetable. Students will remain on the roll at their day school. The on-line classroom provides an innovative relevant and interactive Learning environment. The courses and on-line classroom are provided by the Ministry of Education These on-line courses are taught by TDSB secondary school teachers are part of the TDSB Student's time table; and appear on the Student's report upon completion Benefits of e-Learning Include: Access to courses that may not be available at his or her TDSB school Using technology to provide students with current information: and. assistance to solve timetable conflicts Is e-Learning for You? Students who are successful in on-line course are usually; able to plan, organize time and complete assignments and activities; capable of working independently in a responsible and honest manner; and , able to regularly use a computer or mobile device with internet access Students need to spend at least as much time with their on-line course work as they would in a face-to-face classroom course. |
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