How many kinds of animals live on the Earth?A recent survey shows that scientists have found more than 2 million kinds of animals and there are over 10 million we haven't discovered yet.Animals are much more than food or pets for humans.Animals are smart.Some of them do very unusual thi...
Though taxonomists have been cataloguing plants and animals for more than 250 years, they still have no exact answer to the question, “How many species are on Earth?”“It’s a very simple question, but we have no simple answer,” Fisher said. One of the reasons we can’t get an...
How Many Species Inhabit the Earth?The article discusses 2011 estimates of the number of species on Earth reported by marine ecologist Camilo Mora that used higher levels of taxonomic diversity to form predictions on the species level.EBSCO_AspDiscover...
根据“We live on Earth.”可知,此处与“住在地球”有关,A选项“它是我们的家。”符合语境,故选A。 (2)题详解: 根据“Like the other seven planets, the Earth is running around the Sun.”可知,此处在“描述地球”,C选项“地球就像一个大球。”符合语境,故选C。 (3)题详解: 根据“Through the...
The researchers say this number is a low estimate.This is because they did not have much information on how many ants live underground.Besides,there were not many trusted studies about how many ants live in certain parts of the world,like Africa. ...
相关知识点: 试题来源: 解析 B【答案】B【核心短语/词汇】how long:多长时间【翻译】恐龙在人类之前在地球上生活了多长时间?【解析】A项超过6亿年;B项超过6千万年;C项超过6千年。根据常识可知恐龙在人类之前在地球上生活了超过6千万年,故选B。 反馈 收藏 ...
Why do we have day and night? When the half of the Earth is facing the Sun, it’s daytime. As the Earth turns and this half is away from the Sun, night is coming. And it’s daytime for the other half. 1.How many planets are running around the Sun?
Nature has its own rules. Once one species disappears, other animals will be affected. We need to protect animals in order to maintain (保持) the biodiversity of our planet. It's time to take action to protect animals. First of all, governments can make stricter laws. They can make a ...
When the half of the Earth is facing the Sun, it's daytime. But the Earth and this half is away from the Sun, night is coming. And it's daytime for the other half!1. How many planets are running around the sun? A. Eleven B. Eight C. Nine D. Ten.2. ___ of the Earth ...
How many types of endangered species are there? How many plants are on the endangered species list? How many endangered species are there in the ocean? How many endangered species are there in Asia? How many species go extinct every year?