What does the underlined word “distractions” probably refer to？

A. Ways that help one to focus.

B. Words that help one to feel less tense.

C. Activities that turn one’s attention away.

D. Habits that make it hard for one to relax.

Sports can help you keep fit and get in touch with nature. However, whether you are on the mountains, in the waves, or on the grassland, you should be aware that your sport of choice might have great influence on the environment.

Some sports are resource-hungry. Golf, as you may know, eats up not only large areas of countryside, but also tons of water. Besides, all sorts of chemicals and huge amounts of energy are used to keep its courses (球场) in good condition. This causes major environmental effects. For example, in the dry regions of Portugal and Spain, golf is often held responsible for serious water shortage in some local areas.

There are many environment-friendly sports. Power walking is one of them that you could take up today. You don’t need any special equipment except a good pair of shoes; and you don’t have to worry about resources and your purse. Simple and free, power walking can also keep you fit. If you walk regularly, it will be good for your heart and bones. Experts say that 20 minutes of power walking daily can make you feel less anxious, sleep well and have better weight control.

Whatever sport you take up, you can make it greener by using environment-friendly equipment and buying products made from recycled materials. But the final goal should be “green gyms”. They are better replacements for traditional health clubs and modern sports centers. Members of green gyms play sports outdoors, in the countryside or other open spaces. There is no special requirement for you to start your membership. And best of all, it’s free.

64. Which of the following is the author most probably in favor of？

A. Cycling around a lake.

B. Motor racing in the desert.

C. Playing basketball in a gym.

D. Swimming in a sports center.

A. Science and its applications bring us many dangers.

B. The development of science mostly lies in people’s attitudes.

C. Mankind can largely take control of science with their efforts.

D. The future of science will be influenced by the dangerous ideas.

A.白化病B.炭疽病

C.结核病D.狂犬病

1.下列有机化合物中，只含有C、H、O三种元素的是

A.氨基酸B.核苷酸

C.脱氧核糖D.磷脂