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Toán học - Lớp 11

13/09/2024 23:35:14

Có hai chung cư cao tầng I và II xây cạnh nhau với khoảng cách giữa chúng là HK = 20 m. Để đảm bảo an ninh, trên nóc chung cư II người ta lắp camera ở vị trí C. Gọi A, B lần lượt là vị trí thấp nhất, cao nhất trên chung cư I mà camera có thể quan sát được (Hình 18). Hãy tính số đo góc ACB (phạm vi camera có thể quan sát được ở chung cư I). Biết rằng chiều cao của chung cư II là CK = 32 m, AH = 6 m, BH = 24 m (làm tròn kết quả đến hàng phần mười theo đơn vị độ).

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Toán học - Lớp 11

13/09/2024 23:35:05

Tính \[\sin \frac{\pi }\].

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Tiếng Anh - Lớp 9

13/09/2024 23:34:48

our/ local/ theatre/ put/ on/ production/ "A Christmas Carol"/, which/ fun.………………………………………………………………………………

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Tiếng Anh - Lớp 9

13/09/2024 23:34:46

He was walking through the park when a strange dog suddenly went _______ him.

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Tiếng Anh - Lớp 9

13/09/2024 23:34:45

Complete the following passage by supplying the correct form of the word to fill in each blank. The increase in city crime is a global phenomenon. Some people say that a lot of crime in this country is because of (1 - migrate) ______ and the new people arriving from other countries bring different (2 - culture) ______ values and attitudes to the law. I don’t agree with this idea because the most common crimes are (3 - local) ______ produced and not imported from other countries. (4 - Vandal) ...

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Tiếng Anh - Lớp 9

13/09/2024 23:34:44

His fondness for the game increased with his proficiency.The more ____________________________________________________________________

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Tiếng Anh - Lớp 9

13/09/2024 23:34:42

Read the text below and think of the word which best fits each space. Use only ONE word in each space. Write your answers on your answer sheet. Travel Insurance When going on holiday, it is always a good idea to take out travel insurance. This is just in case something goes (1) _____ along the way. You could lose your luggage, you could be robbed, or even become ill and need expensive medical treatment. For millions of holiday makers, travel insurance is just a precaution (2)_______ ...

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Tiếng Anh - Lớp 9

13/09/2024 23:34:39

Provide the correct form of the word in bold capitals. The World Health Organisation (WHO) is (1) WORRY that 1.1 billion teenagers and people in their twenties and early thirties are damaging their (2) HEAR by listening to loud music. It says (3) NEAR half the young people in middle and high-income countries risk hearing loss because of the "(4) SAFETY use" of personal music (5) PLAY, including smartphones. Loud music in nightclubs, bars and at sporting events also increases the risk. The ...

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Tiếng Anh - Lớp 9

13/09/2024 23:34:32

He prefers tea to coffee.(Rather)

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Tiếng Anh - Lớp 9

13/09/2024 23:34:30

Fill in the gap with one suitable word to complete the paragraph Most of the addicts are men. They come home (1)………….work, eat their meal quickly, and then spend the evening (2)………..their computers. Some of them (3)………….programs, but most of them (4)…………play games. Some wises say (5)……….computer is killing their marriage. Their husbands play until three (6)……..four o’clock in the morning and all weekend. people (7)………..these lonely wives “computer widows”. When television became popular in the ...

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