vẽ 1 trong 3 tranh nầy ( mn vẽ đc cả thì càng tốt )

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions. Inventions That Changed Our World People have been inventing things for years. Paper was invented about 2,000 years ago. The wheel was invented more than 5,000 years ago. What would life be like without paper to write on or bikes to ride? Those inventions have made life easier. Airplane The Wright Brothers invented the first airplane in December 1903. That makes 2003 the 100th anniversary ! Before the airplane was invented, most people traveled by cars, boats, and trains. Today, airplanes help people travel faster. How do airplanes help you? Telephone Alexander Graham Bell invented the telephone in 1876. Before the telephone was invented, people kept in touch by writing letters or talking in person. Today the telephone makes it easier for people to talk to one another. How do telephones help you? Automobile The first four-wheeled gas-powered car was invented by Karl Benz in 1891. Before people had cars, they couldn’t travel easily. They walked or rode horses for short trips. They took trains or boats for long trips. Today cars are one of the main ways people travel. How do cars help you? Computer People worked for years to make the first computer. It was built in 1946. The first computer was called ENIAC. Today computers are an important part of many people’s lives. People use computers as tools to write, get information, and much more. How do computers help you? Question 18. What do all the inventions described in this text have in common? A: All the inventions made people’s lives easier. B: All the inventions changed how people travel. C: All the inventions were invented in the 20th century. D: All the inventions were invented by Americans.

ìm những dẫn chứng để chứng minh cho việc chịu khó nghiên cứu đọc sách tìm ra con đường sống,thành công rực rỡ được nhiều người biết đến

a) (2019-8546)-(2020-8545) b)-47.(85-84)-84.(47-58) c)-167-297-(-297)+(-4)mu2+171-(-2)mũ2 d) (-6)mũ 2.37-36.(-37)+37 e)-25.72+25.(-28)+1500 f,(-2020) mũ 0 . /-5/.16.(-3)mu2 giúp mình với nha mình sẽ votes và cảm ơn tính bằng cách hợp lí nhá toán lp 6 ạ

Ai biết giúp mình câu này với ạ

1 vật dao động đc 500 dao động trong 20 giây.hỏi trong 30 giây vật đc bao nhiêu giao động

Quy đồng mẫu số của hai phân số 3/4 và 7/6 Mẫu số chung nhỏ nhất của hai phân số là ?

Làm giúp mình phần này với ạ I.Complete the passage with the correct tense of the verbs in brackets. Agatha Miller (1)………….(bear) on 15 September 1890 in Torquay in south-west England. Better known as Mrs Agatha Christie, she (2) ……….(write) altogether 78 mystery novels and 19 plays. Very few other crime writers (3) …………….. (write) more books than this, and few (4) have ……………… (become) so immensely popular. Ever since she (5) ……………… (publish) her first novel, The Mysterious Affair at Styles in 1920, her books (6) …………….. (never, be) out of print. They (7) …………….. (translate) all over the world, and, perhaps surprisingly, her sales (8) ……………. (actually increase) since she, (9) ……….. (die) in 1976. For a short time after her death they (10) ………. (fall), so it was perhaps the screen that (11) …………….(revive) her popularity. People (12)…………….(enjoy) Agatha Christie's stories for years, and her popularity currently (13) ………….(seem) higher than it (14……………… (ever be). It is not of course the first time that an author (15) ………. (become) more popular in death than in life. II.Rewrite the sentences with cleft sentences 1.She bought the car from Tom. ( object focus) 2.My secretary sent the bill to Mr Harding yesterday. ( object focus) 3.Nam only turned professional last year. ( adverbial focus). 4.The film was made in Bristol. ( adverbial focus). 5.We are coming to stay with Jane this weekend. ( object focus) 6.Columbus sailed to America in 1492. ( adverbial focus) 7.The president makes the important decisions. ( object focus) 8.I'm most worried about the statistics exam. ( subject focus) 9.She's having the operation in the Queen Mary Hospital. ( adverbial focus) 10.Caroline has been feeling a bit depressed for some time. ( subject focus) 11.I can't come because I've got so much work to do. ( adverbial focus) 12.I had my wallet when I went into the sports hall. ( adverbial focus) 13.She improved her Spanish only by studying very hard. ( adverbial focus) 14.I have had great help from my best friend. ( adverbial focus) 15.Mary objects to how she does it.( object focus) III.Fill in each blank with an appropriate preposition. 1.My uncle is very good……. accompanying people singing …….. his guitar. 2.My brother is fond ……tennis. 3.I have not been very successful ……… playing the guitar. 4.He's keen …….collecting coins. 5.I usually give …….. the common stamps to my friends. 6.She was free to indulge ……. leisure activity like reading.

. Biết vạch phổ đầu tiên của dãy Laiman là ε1, vạch phổ đầu tiên của dãy Banme là ε2, vạch phổ đầu tiên của dãy Pasen là ε3. Thì: A. ε1 < ε2 < ε3 B. ε1 > ε2 > ε3 C. ε2 < ε1 < ε3 D. Không thể so sánh.

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