词汇-美洲阅读词汇单词D级-07课《训练狗狗》Your Dog the Celebrity 38:20 词汇-美洲阅读词汇单词D级-08课《和宠物一起生活》Living with Animals 45:34 词汇-美洲阅读词汇单词D级-09课《健康的宠物是快乐的》A Healthy Pet is a Happy Pet 44:35 词汇-美洲阅读词汇单词D级-10课《旅行》Going Places ...
the knowledge of where togo or whether they learn it after they are born.Now,researchers have found evidence that shows that onetype of bird,at least,learns how to migrate.The bird is the whooping crane(鸣鹤),a tall,whitebird that lives in the United States.In the 1940s,thenumber of ...
Yellow fever is a disease in warm lands that is found mainly along the shores of the Atlantic Ocean.It was first noticed in America, but may have come from Africa and reached the New World soon after Columbus.Yellow fever was one of the most feared diseases in the United States, where ...
the sun.These places are cooler.The NorthPole and the South Pole are the coldest places on Earth.In the United States,warm 5 moves up from thesouth.Winds that blow from the south are 6 Cold airmoves down from the north.Winds that blow from the northare cold.Warm south winds 7 the ...
Cycads(苏铁)grow in warm places.They are tall and green all year round.Their leaves grow on the top and flowers seldom come out.Some have bright orange fruits.They usually need hundreds of years to grow into adult plants.Cycads are facing problems now.In South Africa,the situation of cycads...
Yellow fever is a disease in warm lands that is found mainly along the shores of the Atlantic Ocean.It was first noticed in America but may have come from Africa and reached the New World soon after Columbus.Yellow fever was one of the most feared diseases in the United States where many...
Yellow fever is a disease in warm lands that is found mainly along the shores of the Atlantic Ocean.It was first noticed in America,but may have come from Africa and reached the New World soon after Columbus.Yellow fever was one of the most feared diseases in the United States,where many...
The hottest place in the world is the Sahara Desert in Africa. But there are deserts in many other places: in America in Asia and in Australia. In 1917 the temperature in Death Valley in the United States was over 48°C every day for six weeks. That's very hot!But deserts are not ...
Winter destinations: Warm places to visit in December Not everyone is fond of winter weather and blues especially at the start of December and holiday season. In fact, many snowbirds from Canada and cold winter areas of the USA and Europe opt for going to sunnier climates during the frigid ...
Every winter, western monarch butterflies fly south from the northwestern U.S. To California. At the start of November, they arrive in California, often going to the same places and even the same trees. Once warmer weather arrives in March, the monarchs begin their journey back north, stoppin...