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Mọi người giúp mình với ạ thanks mọi người

1) a) (3^2019-3^2018):3^2018 b) x:5và20≤x< 25 c) 7 chia hết cho x 2)Tìm N thuộc N 2:(N+1)

Câu 19 ý nào không phản ánh đúng nguyên nhân ở trung quốc dưới thời minh-thanh quan hệ sản xuất tư bản chủ nghĩa xuất hiện sớm nhưng không phát triển được A chính sách "bế quan tỏa cảng" của nhà nước phong kiến B tư tưởng "trọng nông ức thương dĩ nông vi bản" của chính quyền phong kiến C nhà nước can thiệp sâu sắc vào hoạt động sản xuất thủ công nghiệp thương nghiệp chính sách thuế trưng tập thợ khéo D sự suy tàn của quan hệ giao thương quốc tế

cho tam giác ABC vuông tại A, AH là đường cao , AM là đường trung tuyến qua H ẻ 2 đường thẳng lần lượt song song với AB và AC cắt AB tại D ,AC tại E 1/ chứng minh AH=DE 2/ chứng minh AM vuông góc DE 3/ gọi Q là trung điểm của BH, N là trung điểm của CH chứng minh DQ//EN

Giải giúp mình bài này với ạ. Mình đang cần gấp

Tuổi hoa cách đây 9 năm bằng 1/4 tuổi hoa 9 năm nữa hỏi hiện nay hoa bao nhiêu tuổi

Học sinh có trách nhiệm gì trong việc phòng chống giảm nhẹ thiên tai

I. Read the following passage and choose the best answer A, B, C or D: H’mong people are an (1)_______ member in the community of ethnic minorities in Vietnam with about one million people, ranked 8th among 54 Vietnamese ethnics. They often (2)_______ the upland areas, from 800-1500m above the sea level, mostly in the Northwest and a few in the central highland of Vietnam. You can easily spot them in Ha Giang, Lao Cai, Sa Pa, Lai Chau, Son La and several other provinces. Their language family is H’mon-Mien, yet the language is a non-written one. Hmong people have a very extraordinary culture that is still vividly seen today. The best time to visit the Hmong is during (3)_____ Lunar New Year in late January or early February - when they would celebrate the 3-day Tet festival. H’mong people believe that they have a common ancestor so they greatly value unity in their community. Several families gather into a cluster and has a leader responsible (4)_____ common works. As for costumes, H’mong people usually wear their self-woven clothes made by linen, decorated with unique technique (5) ______ their strong ethnic characteristics. They drink corn, rice wine, smoking cigarettes using plow. Meanwhile, if you are a guest who is invited a self-loaded plow by a H’mong, you should take it as a friendly fondness. 1. A. experience B. important C. interesting D. independent 2. A. live B. stay C. occupy D. take 3. A. a B. an C. the D. 0 4. A. for B. with C. in D. without 5. A. express B. expressing C. to be express D. to express II. Read the following passage and choose the best answer A, B, C or D Read the following passage and choose the option (A, B, C or D) that best answers each of the questions below. Bamboo is engraved in Vietnamese culture and daily life, providing protection, and representing resiliency. Bamboo can be manipulated in any shape or form to assist in the simplest or most complex of functions. Here in Vietnam, and especially in the countryside, bamboo is used for everything- from chopsticks, to chairs, to agricultural tools, to roofs, to instruments and to home decorations. Bamboo is embedded even in Vietnamese dance culture! A series of bamboo sticks are set up in a line, with people holding them in place on either side. Dancers move in and out of the sticks, trying to time their dancing so as not to get caught between the bamboo sticks. Performers typically dance hand in hand, slowly making their way sideways along the bamboo line and even the best of dancers always tend to get stuck a few times, resulting in bunches of giggles and loads of smiles. (Source: Adapted from We Have Kids) 6. What is the main idea of the passage? A. Bamboo dance is part of Vietnamese traditional art. B. Bamboo is a part of Vietnam culture and daily life. C. Bamboo dance is very easy to learn. D. It is fun to do bamboo dance. 7. What is NOT MENTIONED as a function of bamboo? A.Making chopsticks B. Making agriculture tools C. Making bowls D. Making roofs 8. According to the passage, to perform the bamboo dance, dancers should A. try not to get caught by the bamboo sticks. B. move in and out of the bamboo sticks quickly. C. Both A and B are correct. D. Both A and B are incorrect. 9. Which sentence is NOT TRUE according to the passage? A. We can make many things from bamboo. B. Bamboo dancers use their hands on the floor to dance. C. The best bamboo dancers can still get stuck a few times. D. Bamboo appears a lot in Vietnam daily life. 10. Which explanation has the closest meaning to the word “hand in hand” in the passage? A. Holding each other’s hand B. Clapping each other’s hand C. Shaking each other’s hand D. Waving each other’s hand

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