user-avatar
naruto2852003
2 năm trước
Một thửa ruộng hình chữ nhật có chiều dài lớn hơn chiều rộng 6m.Biết diện tích thửa ruộng là 16m² .Tính các kích thước của thửa ruộng đó
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

II. Complete the sentences with the correct form of the words in brackets 1. Viet Nam is a ..........country not a developed one ( develop) 2. .......are trying their to protect the natural environment ( environment ) 3. Sir Alexander Fleming was the .........of the pelicillin (discover ) 4. Thomas Edison was a wonderful........... ( invent ) D. READING : I. Read the passage, and then decide whether the statements that follow are True or False : The second half of the twentieth century from 1950-2000 saw more changes in technology than in previous two hundred years. Pelicillin has already been discovered and used to treat infictions; there have been many remarkable advances in medicine that have helped to increase our average life expectancy way beyond that of our ancestors. Incredible invovations such as television have changed the way we spend our leisure hours. Perhaps the most important breakthrough, however, has been the microchip. Nobody could have imagined, when it was first invented, that within a matter of years, this tiny piece of silion and circuitry would be found in almost every household object from the kettle to the video recorder. And nobody could have predicted the sudden proliferation of computers that would completely change our lives, allowing us to access information from the other side of the world via the Internet or send messages around the world by e-mail in an easy way. Meanwhile, research into other aspects of information technology is making it easier and cheaper for us to talk to friends and relations around the world 1.Complete the sentences with no more than three words. 1. The word “infictions“ in the text refers to …………………… 2. Thanks to advances in medicine we now…………. Than our ancestors. 3. ……………may be the most important breakthrough. 4. According to the passage, it is very ………..to send an e-mail. 5. Now adays, it costs us ……………to talk to relation and friends around the world than it used to do 2. Choose the best answer. 1. What period saw a changes in technology than in previous two hundred years? A.1800-1850 B. 1850-1900 C. 1900-1950 D. 199950-2000 2. Television has changed the way we spend our………… A. money B. weekdays C. free time D. working time 3. Which of the following does not belong to household objects? A. a kettle B. an electric cooker C. a video recorder D. a blackboard 4. According to the passge the computer has developed…………… 5. It is inferred from the passage that technology has……… affected our life. A. positively B. poorly C. negatively D. badly A robot cannot think or do things alone. People use a computer to control it . Today, robots are not very popular because they are too expensive, but they are very useful . They can help us save alot of time and work. A robot can do the same work for 24 hours, and yet, it does not complain or get tired. In the US people use robots to guard some important places. These robots can listen to certain noises and send signals for help if there is trouble or danger. In Japan, people use robots in factories to build cars. In the future, scientists will design many types of intelligent robots. Their robots will be able to do many more complicated things. However, some people do not like robots because the fear that one day robots will be too powerful.

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team