một khối gỗ hình lập phương có thể tích là 64 dm3 . Người ta sơn tất cả các mặt khối gỗ đó . Hỏi DT quét sơn bằng bao nhiêu dm2

Viết về thuận lợi và bất lợi về viec học

cho đoạn chương trình sau S:=1; for i:=1 to 6 do S:=S+i; tính giá trị của S

Science and technology (S&T) capabilities are fundamental for social and economic progress in developing countries; for example, in the health (19) ______ , scientific research led to the development and introduction of oral rehydration therapy, which became the cornerstone of international (20) ______ to control diarrheal diseases. Research also established that two cents worth of vitamin A given to children every six months could (21) ______ child mortality in many countries by over one-third. In agriculture, rice-wheat rotation techniques have significantly enhanced food production in South Asia. In Central America, scientifically based natural resource management has been essential in developing the tourist (22) ______ , a major source of foreign currency. International programs based on S&T are critical components of U.S. foreign policy, and particularly foreign assistance activities. Foreign assistance, probably more than any other international endeavor, (23) ______ opportunities for representatives of the U.S. government and its partners to join with political and economic leaders, intellectuals, and activists of dozens of countries in continuing, constructive dialogues and in concrete projects designed to enhance the quality of life of hundreds of millions of people. S&T are often the keystones for (24) ______ projects. The shared political and economic dividends from these activities can be enormous. 19. A. sector B. area C. region D. item 20. A. nations B. sessions C. owners D. efforts 21. A. mention B. reduce C. survey D. conflict 22. A. career B. branch C. industry D. agriculture 23. A. surround B. provides C. combines D. impresses 24. A. friendly B. beautiful C. delicate D. successful giải thích nữa nha mọi người ơi.

1,cities\the\is\DA NANG\Famous\one\of\in\most\VIET NAM

một hình tam giác có đáy là 45cm độ dài đáy bàng 5/3 chiều cao tính diện tích hình tam giác đò

Tính đạo hàm của hàm số x^5-4x^3+2x-3√x

Choose the underlined word or phrase A B C D in each sentence that needs correcting 1. The white rings of Saturn the (second A) largest planet in the (solar B) system and named (for C) the ancient Roman God of agriculture (had been seen D) by the astronomer Galileo in 1610 2. Mars is (called A) the Red Planet (beacuse B) ( its C) (reddish D) surface 3. By (measuring A) (the B) colour of a star astronomers can tell (how C) hot (is it D) 4. In 1975, NASA (cooperate A) (with B) the Soviet Union (to achieve C) the firts international human space flight the Apollo Soyuz (Test Project D)

Các bạn giải giúp mik đi mai thi r

Q.đ AB dài 100km.Lúc đi ô tô có vận tốc bằng 6/5 vận tốc về. Đến B nghỉ lại 20 phút.Và quay về A hết tổng cộng là 4h. Tính vận tốc đi và về của ô tô