题目

下列哪种营养成分不含有能量                                                               （   ） A．蛋白质     B．葡萄糖      C．无机盐      D．脂肪 答案：C   Your Car Is Ready for Take-offThe flying car has been talked about for many years，but now it appears that the idea is about to become a reality.An international company has built a two-seater plane that, at the touch of a button ，transforms into a car perfectly suitable for driving on public roads. It has been designed so that the wings fold up automatically； and it takes just 15 seconds to switch between flying and driving. With its wings fully open and the propeller(螺旋桨）spinning, it can take off from any airfield.Flying cars are quicker than traditional ones for travelling from city to city，and they can run on ordinary fuel. Another big advantage is that they are cool ，like something you would see in an action film. At the moment 9 however, the flying car’s wheels are illegal to leave the ground. That is not because of technical reasons or problems with the design. It is because the various road and aircraft authorities simply cannot agree on whether it is a car or a plane.“The government and the authorities have never thought seriously about a flying car, says Alan Price ，the president of the company that has developed it. “I wanted a car that could fly and drive ，but it is difficult to find an organization prepared to insure the vehicle against accidents. Nevertheless ? the company hopes to produce and deliver its first flying car soon. The company already has orders for 40 of them. The majority the potential customers are older and some are retired。There have even been orders from some people who have no pilot's license.The flying car will cost around $ 200.000. “For an airplane ， that’s a very reasonable price， but for a car, It's quite expensive，” explains Alan. “But it just is not possible to make a $ 10，000 flying car yet. ”This latest means of transport will not become a mass-market item in the near future，but in the long term it has the potential to change the way you travel. It will become no more expensive than driving your car on the motorway. Travel time could be reduced by more than half.So the next time you are told to fasten your seat belt, it may be to prepare for take-off.【小题1】We know from the passage that the flying car______A．has to run on special fuelB．will replace traditional planesC．is popular with the richD．can shift between two forms【小题2】The flying car is presently forbidden to take off because______.A．many people think driving it not very safeB．it’s hard to decide whether it's a car or a planeC．the government and the authorities don’t accept itD．there are still some technical problems to be solved【小题3】We can learn from the passage that______.A．few people will be able to afford a flying carB．flying cars may share the market in the futureC．traffic jams will disappear because of flying carsD．driving a flying car doesn’t require a pilot’s license