七年级上册英语书29页2b朗读

七年级上册英语书29页2b朗读
2b朗读：
Hello everyone! Today I'm going to talk about my favorite animal - the dolphin. Dolphins are amazing creatures that live in the ocean. They have a streamlined body, a blowhole on top of their head, and a long snout called a rostrum. Dolphins are highly intelligent and very playful.
Dolphins are known for their unique communication skills. They have a series of clicks, whistles, and body movements that they use to communicate with one another. Scientists believe that dolphins have their own language. It's fascinating to watch them communicate and interact with each other.
One interesting fact about dolphins is that they are very social animals. They live in groups called pods, which can include anywhere from a few dolphins to hundreds of them. Dolphins work together to hunt for food, protect each other from predators, and even play games. They are incredibly cooperative animals.
Another amazing thing about dolphins is their incredible speed and agility in the water. They can swim at speeds of up to 20 miles per hour, and they can jump and perform acrobatic tricks. It's a spectacular sight to see dolphins leaping out of the water and doing flips in the air.
Dolphins are also known for their kindness towards humans. There are many stories of dolphins saving humans from danger, such as rescuing them from drowning or guiding lost sailors back to shore. It's heartwarming to see the bond between dolphins and humans.
Sadly, dolphins face many threats in their natural habitat. Pollution, fishing nets, and habitat destruction are some of the main dangers they face. Many organizations and individuals are working hard to protect dolphins and their environment.
In conclusion, dolphins are incredible creatures that deserve our admiration and protection. Their intelligence, social behavior, and agility make them truly extraordinary. Let's do our part to ensure that these amazing animals continue to thrive in the oceans for generations to come.
写出相关参考内容：
Dolphins belong to the family Delphinidae. They are mammals, not fish, and they breathe air through their blowhole. Dolphins have a layer of blubber that helps to keep them warm in cold waters. They also have teeth to catch and eat fish and squid.
Dolphins can be found in oceans all around the world. There are nearly 40 different species of dolphins, including the common dolphin, bottlenose dolphin, and killer whale or orca. Some dolphins, such as the pink dolphin, can live in freshwater rivers.
Dolphins are carnivorous, which means they eat meat. They have a varied diet that includes fish, squid, and even smaller dolphins. They use echolocation, a system of using sound waves to locate objects, to hunt for food. Dolphins can also use echolocation to navigate and avoid obstacles.
The lifespan of a dolphin varies depending on the species, but they
can live up to 50 years in the wild. Female dolphins are usually slightly smaller than males. They give birth to one calf at a time and take great care of their young.
Dolphins are popular animals in entertainment parks and aquariums. However, there is a growing movement to end the captivity of dolphins and promote their conservation in the wild. Many countries have implemented laws and regulations to protect dolphins and their habitats.
Overall, dolphins are fascinating creatures that continue to captivate the imaginations of people around the world. Their intelligence, social behavior, and agility make them truly remarkable animals that deserve our respect and protection. Let's work together to ensure the future of dolphins and the oceans they call home.。