Tại sao Châu Nam Cực là một hoang mạc lạnh mà vùng ven bờ lục địa và trên các đảo vẫn còn nhiều chim và động vật sinh sống?

Giúp em làm câu 5,6,7,8,9,10 em cho 5 sao

Tìm x để pt x^2 +2(m-1)x-2m+5=0 có 2 nghiệm x1,x2 và x1^3+x2^3=0

Tìm số nguyên m để 2n+13/n+8 là số nguyên. DẤU "/" là phần nha !!! CÁC BẠN HELP ME !!!

Cho tam giác ABC. Một đường thẳng song song với BC,cắt AB và AC thứ tự D và E sao cho DE=1/2BC. Chứng minh rằng DE là đường trung bình của tam giác

Viết đoạn văn nêu cảm nhận về tư tưởng nhân nghĩa của Nguyễn Trải qua 2 câu thơ sau "Việc nhân nghĩa cốt ở yên dân Quân điếu phạt trước lo trừ bạo"

1, A renewable source is one that may be replaced overtime by natural process or is ....... (EXHAUST) 2, Do you know that ......... have to follow 15 stages to a conical hat? ( ART)

Ai chỉ ưm nốt 2 bài này ạ em cảm ơn

I.Read the following passage then decide if the statements are true or false. The big problem for plane-makers in the future is the size of the airplanes, not their speed. Because the skies are already full of air traffic, some countries are planning to make new super-planes and reduce the number of planes in the skies. Those new planes will be much bigger than the planes we see today, and they will be able to carry up to eight hundred people at one time.At the moment, a billion people travel on airplanes a year, but this number will be a lot higher by the year 2020. The best way to avoid traffic jam in the skies is to build bigger planes. Plane-makers are working to turn their designs into real super-planes. Ten years from now, we may possibly be travelling on a super-plane for the first time. 1. The skies are already full of air traffic. 2. Some countries are planning to make new super-planes and increase the number of planes in the skies. 3. New super-planes will be albe to carry to eight hundred people at one time. 4. Less than one billion people will travel on airplanes in 2020. 5. The best way to avoid traffic jam in the skies is to build faster planes. II.Read the passage and circle A, B or C to complete the sentences. Travelling in the future will be much easier and safer. People may travel in a dreiverless car. Even old and disabled people will be able to use it, because the car can drive itself. However, a driverless car will be expensive.People can choose to go on foot on moving pavements. A Swiss company has invented a system of high-speed moving pavements. People will go through the streets at up to 15 kilometres per hour just by standing on the pavements. This will reduce travelling time of pedestrians and traffic jams effectively. Therefore, more people will leave their vehicles home. 1.People may travel……………………a driverless car. A. at B. in C. on 2. Even old and disabled people will be able to use it, because the car can………………itself. A. drive B. ride C. pedal 3. People can choose to go………………….foot on moving pavements. A. with B. on C. in 4. A Swiss company has invented a system of…………………..moving pavements. A. high-speed B. low-speed C. slow 5. More people …………………their vehicles home. A. leave B. will leaving C. will leave

Thức ăn được cơ thể vật nuôi tiêu hóa và hấp thụ thế nào Mục đích của chế biến và dự trữ thức ăn cho vật nuôi