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anndau2004
2 năm trước
Giúp bài 2 với ạ Cho ∆ ABC vuông cân tại A,ở phía ngoài. ∆ABC vẽ ∆BCD vuông cân tại B CMR tứ giác ABCD là hình thang vuông
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Katy Dixon is a famous scientist. She works at a university in London. She is a vulcanologist. That means that she ........... ( study ) the science of volcanoes. She ........... ( spend ) most of the time at the university. She ............. ( do ) experiments in a laboratory, and she also ............ ( teach ) students. But sometimes she ............. ( travel ) to interesting places in the world and .............. ( explore ) real volcanoes. This week, Katy ........... ( visit ) South America. She ........... ( make ) a programme for televition. Today, they .......... ( film ) an ' active ' volcano. Ac tive volcanoes sometimes .............. ( erupt ), so she has to be careful. At the moment, Katy ...... ( sit ) at the top of the volcano and .......... ( talk ) about lava. She .......... ( think ) it is the best job in the world ! CÁC BẠN LÀM GIÚP MÌNH VỚI MÌNH CẢM ƠN

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