In today's program, I'd like to share something about frogs. So how many species of frogs are there in the world? " About 4,000 species are now known to scientists. They are different in size. The smallest frog is less than half an inch and the biggest frog is nearly a foot long...
Nowadays, there are many celebrities who are famous for their glamour and wealth rather than achievements and this sets a bad example for young people. To what extent do you agree or disagree? Give reasons for your answer and include any relevant examples from your own knowledge or experience....
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In the last decade, new methods of estimating global species richness have been developed and existing ones improved through the use of more appropriate statistical tools and new data. Taking the mean of most of these new estimates indicates that globally there are approximately 1.5 million, 5.5 ...
As a result, many native species are endangered because of the explosion of feral cats. Image Credit: Laurie E Wilson, Shutterstock Relation to the Common House Cat There are two classifications of wild cats: big and small. Initially, all cats evolved from big cats, such as Tigers, ...
化学与人体健康密切相关：（1）市场有“铁强化酱油”、“含氟牙膏”、“高钙牛奶”、“加碘食盐”等商品，这里的铁、氟、钙、碘应理解为___（填编号）①元素②原子③分子④氧化物（2）妈妈每天为小明准备的食品有：奶类、豆类、鱼肉类、水果、蔬菜、面食等，这些食品中含有___等人体所需营养素（只需填写两种...
1. How many sections of the Great Wall are there around Beijing according to the text? A.Three. B.Five. C.Seven. D.Nine.2. Which of the following is TRUE according to the text? A.Badaling is to the west of Juyongguan. B.Hiking from Jiankou to Mutianyu is the easiest. C.It ...
Conservation efforts can take place over a(n) (39) ___ area now there is evidence that they migrate out of Australian waters. • Future studies: To explore whether pygmy whales off the southern coast of Australia follow the same northerly migratory routes as those studied or whether they ...
–Talk to your family, and ask if you could all try somevegetarianorvegan meals. There are loads of meat-free and plant-based recipes available online, or you can try ourveggie pasta bake! –Know where your food comes from! When you’re in the supermarket, ask a grown-up to help che...
It's that time of year again when the RSPB ask the people of the UK to take part in their annual Big Garden Birdwatch. Here's what to know for 2025...