Hybrid cars introduced by Toyota and Honda in the past few years have sold well, Hybrid engines offer greater mileage than petrol - only engines, and the batteries recharge themselves. Ford says it thinks such vehicles will help it meet planned new guidelines on vehicle emissions in the US.
Hybrid cars run faster than petrol driven cars.

单项选择题The Earth is surrounded by an ocean of gases we call the atmosphere. The atmosphere is important because it contains the air most living things breathe. It also absorbs heat energy from the sun. It even recycles water by returning it back to the Earth as rain. Without the atmosphere, life as we know it could not exist on Earth. The atmosphere is important for the single reason that most living things need to breathe on Earth.

单项选择题An estimated 36 million to 46 million people are living with AIDS, two - thirds of them in Africa, but only 440,000 people in developing countries were receiving treatment by the end of 2003, the UN health agency said in its annual report. Without treatment, all of them will die a premature and in most cases painful death, the WHO said in the 169 page World Health Report. Most people living with AIDS will die a premature and painful death