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[单项选择]TEXT C
If you want to know why Denmark is the world’s leader in wind power, start with a three-hour car trip from the capital Copenhagen --mind the bicyclists --to the small town of Lem on the far west coast of Jutland．You’ll feel it as you cross the 6.8 km-long Great Belt Bridge：Denmark’s bountiful wind，so fierce even on a calm summer’s day that it threatens to shove your car into the waves below．But wind itself is only part of the reason．In Lem，workers in factories the size of aircraft hangars build the wind turbines sold by Vestas，the Danish company that has emerged as the industry’s top manufacturer around the globe．The work is both gross and fine；employees weld together massive curved sheets of steel to make central shafts as tall as a 14-story building，and assemble engine housings(机器外罩)that hold some 18,000 separate parts．Most impressive are the turbine’s blades, which scoop the wind with each sweeping revolution．As smooth as an Olympic swimsuit and honed to aerodynamic per
A. Technology
B. Wind
C. Government drive
D. Geographical location．
[单项选择]Do you know why different animals or pests have their special colors Colors in them seem to be used mainly to protect themselves.
Some birds like eating locusts(蝗虫), but birds cannot easily catch them. Why It is because locusts change their colors together with the change of the colors of crops. When crops are green, locusts look green. But as the harvest time comes, locusts change to the same brown color as crops have. Some other pests with different colors from plants are easily found and eaten by others. So they have to hide themselves for lives and appear only at night.
If you study the animal life, you’ll find the main use of coloring is to protect themselves. Bears, lions and other animals move quietly through forests. They cannot be easily seen by hunters. This is because they have the colors much like the trees.
Have you ever found an even more strange act A kind of fish in the sea can send out a kind of very black liquid(液体)when it faces danger. While the liq
A. are small animals
B. are easily found by birds
C. are dangerous to their enemies
D. change their colors to protect themselves
[单项选择]You want to get healthy. You know you need to exercise more. But you are not ready to do intense physical activities. Don’t worry! The best thing for most of us may be to just go for n walk.
Yes, walk. At a reasonably vigorous clip (five to six kilometers per hour) for half an hour or so, maybe five or six times a week. You may not feel the benefits all at once, but the evidence suggests that over the long term, a regular walking routine can do you good.
Walking, in fact, may be the perfect exercise. For starters, it’s one of the safest things you can do with your body. It’s much easier on the knees than running and doesn’t trigger side effects.
Regular physical activity is probably as close to a magic bullet as we will come in modem medicine, If everyone were to walk briskly for 30 minutes every day, we could cut the incidence of many chronic diseases by 30 to 40 per cent.
Walking is also a great way to lose body fat, so even if you don’t 10se any weight, your body
A. Going to the gym regularly.
B. Intense physical activities.
C. Running over a long term.
D. A regular walking routine.
