A3 × × will fly faster while consuming less oil. 查看

The diesel engine consumes considerably less fuel than the steam engine for equal output,

The first A3 ×× will be available in 2003. 查看材料A.R

Some birds will fly away to the south in winter, while _____ will stay with you. A.

The countrys main exports are oil, cars and consumer electronic gadgets, oil ______the mos

As there is less and less coal and oil, scientists are exploring new ways of making us

What will happen in the middle of the 21st century if we consume resources much faster th