Biết tỉ số thể tich của hai hình lập phương A va B la 2:3. Biêt Hình A có thể tích la 64cm3. Tính: a) Thể tich của hình lập phương lớn B bằng bao nhiêu phần trăm thể tích của hình lập phương bé A? b) Tính thể tích của hình lập phương lớn B.

Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

1 khu rừng hình chữ nhật có chu vi là 5km 60dam .Chiều dài hơn chiều rộng 1200m .Hỏi diện tích khu rừng đó là bao nhiêu dam2 ? bao nhiêu m2 giúp tui nha

A=$frac{1}{5}$+$frac{1}{10}$+$frac{1}{17}$+...+$frac{1}{1+9^2}$+$frac{1}{1+10^2}$.Chứng tỏ rằng giá trị của A không phải là một số nguyên.

A/c giúp em ý b bài 4 với ạ Em cám ơn

Giải thích nghĩa của các câu tục ngữ sau.Chỉ ra biện pháp tu từ được sử dụng .Bài học được rút ra qua các câu tục ngữ này - Học 1 biết 10 - Ăn vóc học hay - Đi 1 ngày đàng học 1 dàng khôn

Các bạn giúp mình với ! Bài hơi dài nhưng giúp mình với .

Chỉ mình bài này với các bạn ơi mai mình nộp rồi

chỉ ra những biểu hiện tấm lòng yêu nước của Thân Nhân Trung thông qua bài " Hiền tài là nguyên khí của quốc gia" có thể trình bày đoạn hoặc ý

71. Singapore is famous for itsand green trees. A. cleanliness B. cleanly C. cleaning D. clean 72. In some English speaking countries, turkey and pudding are food at Christmas. A. national B. historical C. traditional D. possible 73. The USA has a population of 304 million, and it’s the third_________ country in the world. A. smallest B. largest C. narrowest D. highest 74. The roof of the building in a storm a few days ago. A. damaged B. was damaged C. has damaged D. has been damaged 75. A severe tropicalis called a typhoon. A. drought B. rain C. flood D. storm 76. As soon as the floodwater down, people their houses. A. went – cleaned B. had gone – cleaned C. went - had cleaned D. had gone – had cleaned 77. The old tradition of first-footing is still practises today in _____ A. Scottish B. Scots C. Scotland D. English 78. In Canada, the serving of coffee at the end of an evening is a signal that it is time for _____ to prepare to leave. A. visitors B. tourists C. holiday makers D. relatives 79. If the factory continues dumping poison into the lake, all the fish and other aquatic animals _____. A. die B. to died C. dead D. will die 80. Australia has the biggest _____ station in the world. A. nations B.cattle C. games D. continents 81. There is a red maple leaf on the _____ of Canada. A. flag B. banner C. money D.currency 82. Emergency teams are still removing the _____ from the plane crash. A. dirt B. debris C. dust D. sweet 83. The heavy rain has caused _____ in many parts of the country. A. storms B. floods C. mudslides D. drought 84. She prefers English _____ France A. to B. for C. at D. in 85. there will be a _____ rainstorm next week . A. power B. powerful C. powerless D. powerly 86. When she comes home later today, he __________ the dinner. A.cooks B.is cooking C.will be cooking D. will be cooked 87.I hope you __________ when I arrive at 8 p.m. today! A.didn’t work B.won’t be working C.don’t work D. are working 88.What __________ in the year 2020? A.am I doing B.will I be doing C.do I do D. does I do 89.Which TV programme __________ at 9 p.m. tomorrow? Revision for the Middle-Term-Test School Year: 2018 - 2019 5 A.did you watch B.will you watch C.will you be watching D. are you watching 90.__________ your laptop this evening? May I borrow it to do my project homework? A.Do you use B.Will you be using C.Were you using D. Will you use 91.At 11 a.m. tomorrow, he will be in. He __________ with his colleagues in Africa. A.video conferenced B.video conference C.will be video conferencing D. video conferences 92. People from other planets may use ___________ to communicate, which is not possible for human beings. A.landlines B.letters C.chat rooms D.telepathy 93. Teenagers often use abbreviations when ___________. A.texting B.video conferencing C.sending letters D.talking 94. People who cannot hear or speak often communicate using ___________. A.pictures B.sounds C.codes D.signs 95. ___________ is popularly used to enable people from different countries to have meetings. People can watch, and listen to each other through a screen. A.Chatting B.Video conferencing C.Emailing D.Texting 96. The ___________ in technology allow astronomers to know more about outer space. A.developments B.science C.exploration D.discovery 97. Alexander Graham Bell was a great ___________, who invented the telephone. A.developer B.conservationist C.scientist D.explorer 98. To generate cheap and clean energy, instead of burning fossil fuels, scientists have developed ___________. A.oil B.solar panels C.electricity D.coal burning 99. ___________ systems use several different ways of giving information with sounds, pictures, and texts on a screen. A.Emailing B.Telephoning C.Multimedia D.Chatting 100.Astronauts use ___________ to move around when they are on the Moon’s surface. A.spaceships B.flying saucers C.space cars D.moon buggies 101. I intended __________ to New York next month. A.flew B.to fly C.fly D. flying 102. I prefer __________ a nine-to-five job to working shifts. A.did B.doing C.do D. does 103. She said she chose __________ for one year before entering university. A.to work B.worked C.working D. works