一“水下尖兵”——海豚 海豚是海洋里的一种体形似鱼的哺乳动物。它善通人性,其机灵程度超过了猿猴,特别是它有着比一般人还大20％的脑容量,具有较高级的神经系统;它能区分出从低声波到超声波宽大声波谱段的各种声音,听觉相当发达;它能在水下发射超声波,即使海洋里的一条小鱼也难以逃脱它敏锐的感觉;它还能在400米以下的深水中捕捉各种物品。人们利用海豚这些生 A “Underwater Voyager” - Dolphin Dolphin is a kind of fish in the ocean mammals. It is good at humanity, its smart than the apes, in particular, it has 20% more than the average human brain capacity, with a higher level of the nervous system; it can distinguish from low to wide range of ultrasonic sound waves of sound , Hearing quite well developed; it emits ultrasonic waves under the water, even a fish in the sea can not escape its keen sense; it can also capture a variety of items in deep water below 400 meters. People use dolphins for these students