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hiệu điện thế giữa 2 đầu dây thứ cấp và cuộn dây sơ cấp p của một máy biến thế lần lượt là 110V và 220V nếu số cuộn dây thứ cấp là 110 vòng thì cuộn dây sơ cấp là bao nhiêu
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Exercise 1: Read the text. Write the correct words to complete the sentences. Các bạn điền các từ ở trong ngoặc vào các chỗ trống ở dưới sao cho phù hợp nha) (creation,historians, educational, knowledgeable, illustrations, greatest, accurate,comedian) So, who says only_________and archaeologists can write books about times gone by? Unlike Anthony Beevor, one of England's___________experts on the past, Jon Stewart, the American author of Earth(the book), is anything but an academic. Many would think that Stewart's background as a top__________________and brilliant talk show host would be of no use when writing a book about history. But he has managed to do it, and in such a way that almost everyone who reads it will be a bit more________________about the subject. Using humour as an_________tool, Stewart takes his readers back to the________________of time, gives his opinion on how the Earth was formed, and then proceeds to take readers through the ages only to finally end up back in the present. At times sarcastic and ironic, and some critics claim, at times_____________, Stewart's work is both entertaining and informative. Full of colourful_____________________ ,map and diagrams, the book is must-read for anyone with a sense of humour and a thirst of knowledge. GIÚP MÌNH VỚI!!!!!!!!!!!!!!!!

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