ответить на вопросы 1. how much dirt does the average person eat during their life? 2. what kind of animals can’t jump? 3. which continent has no active volcanoes? 4. how fast does the earth rotate? 5. how many ants are there in the world? 6. how long can snails sleep? 7. how do guide dogs know when to cross the road? 8. how far do arctic terns fly every year? 9. what is the present population of the world?