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laianh332001
2 năm trước
Chỉ mình vẽ hình bài này được không ạ Cho tứ diện ABCD có ba góc vuông tại A . dựng AH vuông góc (BCD) (H thuộc (BCD) Chứng minh CH vuông góc BD. Từ đó suy ra H là trực tâm tam giác BCD
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III. Complete the sentences with the correct form of the words in brackets. 1. Motor racing is very ..................................... sport. (use ) 2. Fish soup is a .................................. of this area, you must try it. ( special) PART C – READING Read the passage carefully and do the task below Ha Long-Bay of the Descending Dragon-is popular with both Vietnamese and international tourists. One of the attractions of Ha Long is the Bay’s calm water with limestone mountains. The Bay’s water is clear during the spring and early summer. Upon arriving in Ha Long City, visitors can go along Chay Beach. From the beach, they can hire a boat and go out to the Bay. It is here that visitors can find some of Southeast Asia’s most beautiful sites. Dau Go Cave is one of the most beautiful caves at Ha Long. It was the cave in which General Tran Hung Dao hid wooden stakes to beat the Mongols in Bach Dang River in 1288. * True or False? 1. ………. Most of Vietnamese and international tourists have known Ha Long Bay . 2. …….… Limestone mountains in Ha Long Bay attract a few tourists . 3. ………. From the beach , tourists can go out to the Bay by a plane . 4. ………. General Tran Hung Dao hid wooden stakes to beat the Mongols on Bach Dang River in Dau Go Cave .

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