gttd cua am 9 tru x ket thuc gttd tru 5 bang12

Mọi người ơi giúp em làm bài này với ạ. Em đang cần gấp lắm

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 21. The primary purpose of this passage is to describe ________. A: some inventions that have made a big difference. B: the invention of the airplane in December 1903. C: some ways that computers help to make our lives easier. D: the reasons why Karl Benz invented the gas-powered car. Question 17. Which of the followings are two inventions in the passage that were invented before 1900? A: the telephone and the car B: the car and the computer C: the computer and the airplane D: the airplane and the telephone Question 20. What does the word anniversary in the second paragraph most nearly mean? A: an interesting idea B: an event C: a statement of fact D: a celebrate date

Lam hộ em bài số 2 vs ạ Em cảm ơn trước

giúp em câu này vs ạ em xin cám ơn

Hãy chứng minh cuộc sống của chúng ta sẽ bị tổn hại rất lớn nếu chúng ta không có ý thức bảo vệ môi trường

giúp mình vs ạ,mh cần gấp. Bài tìm lỗi sai thì chỉ ghi đáp án ABCD không phải sửa

Làm giúp mik nha cảm ơn nhìu làm bài 4 nha

Giải các phương trinh sau: 1. 7x-21= 0 2. (x-1)^2 + (2- 3x)(1-x)= 0 3. 3x^2= 2x- 6 4. (2x + 1)² = (x- 1)^2 Làm giúp mình 4 câu này với cảm ơn nhiều

Một ô tô đi từ A đến B với vận tốc là 50km/h, rồi đi từ B về A với vận tốc lớn hơn vận tốc lúc đi là 10km/h. Tính quãng đường AB biết thời gian về nhanh hơn thời gian đi là 24 phút