Giải bài I từ câu 11 đến 20 trắc nghiệm

Tìm biểu thức sai trong các biểu thức

Chứng minh rằng: 1 -1/2^2 -1/3^2 -1/4^2-...-1/2009^2>1/2009

Giải bài I từ câu 1 đến 10 trắc nghiệm

tả cảnh biển mà em thích có sử dụng 3 đến 4 phép so sánh rồi gạch chân dưới từ so sánh( viết 5 -> 7 câu) giúp mik với ạ ko copy mạng mong mod giúp mong các chuyên gia và mọi người giúp đỡ

Vẽ chibi mặc bộ quần áo pokemon tradi ko digi full màu nha tranh cũ cứ ném vào đây ( thoi ko cần kí đâu ) 50 điêm của tui đó vẽ đẹp vào

Read the passage below carefully and choose the correct answerA, B, C or D. According to World Health Organization(WHO) research, the emission from car exhausts causes more death than road accidents. The research found that one third of all harmful air pollution was caused by road transport, and that long term exposure to pollution caused estimated 21,000 premature deaths a year across the three countries, France, Austria, and Switzerland. This is much higher than the 9,947 who died that year as a result of road accidents. In addition, the researchers calculated that the car fumes caused 300,000 extra cases of brochitis in children and 15,000 extra hospital admissions for heart disease made worse by the pollution. They calculated that the cost of dealing with all this was 27 billion Euros per year. A lot of money goes into making cars safer, but not as much is spent solving air pollution. 71. What is the main idea of the text? A. Pollution and road accidents. B. Bad affects of cars exhaust C. The necessity of making cars safer D. The toll of road accidents 72. According to the passage, ________. A. Air pollution causes more deaths than road accidents. B. Road accidents cause more deaths than car fumes. C. Long term exposure to pollution is harmless. D. Car fumes cause one third of premature death. 73. Which of the following sentences is not true. A. Car exhausts causes bronchitis and heart disease. B. Car fumes cause one third of all harmful air pollution. C. Each year road accidents cause 9,947 deaths. D. More people died as a result of air pollution than road accidents. 74. The money spent to solve air pollution is ________. A. 27 billion Euros per year B. not able to calculate C. more than to make cars safer D. less than to make cars safer 75. Which of the following sentences is not mentioned as the bad affect of air pollution. A. Causing illness in children B. Causing premature deaths C. Causing road accidents D. Causing heart diseases

Giúp mình với ạ, cảm ơn gất nhìuuu

Cho mik hỏi Đà Lạt có phải 1 danh lam thắng cảnh ko ạ. Chết rùi lẽ nào mik lạc đề.

Cho tam giác ABC vuông tại B.Kẻ BH vuông góc với AC tại H ,từ H kẻ HM vuông góc với AB ,HN vuông góc với BC CMR:MN=BH Gọi O là giao điểm của MN và BH .So sánh OB với OH,OM với ON CMR:góc OHN=C