week6四级笔试模拟试卷3
吃什么药会死week6四级笔试模拟试卷3
Part I Writing
1. 目前人们是否真的越来越少使用手写了
2. 打字在哪些方面能代替手写，哪些方面不能
3. 练习手写字（或书法）是否还有必要分手后怎么走出来>芳菲是什么意思
Part II Reading Comprehension (Skimming and Scanning)
Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions. For the first ven questions, choo the best answer from the four choices marked A), B), C) and D). For the last three questions, complete the ntences with the information given in the passage.
A Healthy Mix of Rest and Motion
Some gym goers are tortois (乌龟). They prefer to take their sweet time, leisurely riding or walking along on a track. Others are rabbits, impatiently racing through miles at high speed. But new findings suggest that for at least one exerci a week it pays to be both tortoi and rabbit—changing between short bursts of hard exerci and easy easy-does-it recovery.
Weight watchers and tho who simply want to increa their fitness (健康) all stand to gain. This fast-slow changing technique, called interval training, is hardly new. For decades, rious athletes have ud it to improve performance. But new evidence suggests that an exerci with steep peaks and valleys can greatly improve heart fitness and rai the body's potential to burn fat.
Best of all, the benefits become evident in a matter of weeks.
"There's definitely renewed interest in interval training," said Ed Coyle, the director of the human performance laboratory at the University of Texas at Austin.
A 2005 study published in the Journal of Applied Physiology(生理学) found that after just two weeks of interval training, six of the eight college-age men and women doubled their endurance, or the amount of time they could ride a bicycle at moderate speed before getting very tired.
Eight volunteers in a control group, who did not do any interval training, showed no improvement in endurance. Rearchers at McMaster University in Hamilton, Ontario, had the exercirs run for 30 conds, then either stop or ride gently for four minutes.
Such a sharp improvement in endurance after 15 minutes of inten cycling spread over two weeks was all the more surprising becau the volunteers were already quite fit. They jogged, biked or did exerci two to three times a week.
Doing bursts of hard exerci not only improves heart fitness but also the body's ability to burn fat, even during slow or moderate exercis, according to a study published this month. Eight women in their early 20s cycled for 10 ts of four minutes of hard riding, followed by two minutes of rest. Over two weeks, they completed ven interval exerci
s.
连衣裙英语怎么写
After interval training, the amount of fat burned in an hour of continuous moderate cycling incread by 36 percent, said Jason L Talanian, the lead author of the study and an exerci scientist at the University of Guelph in Ontario. The ability of the heart and lungs to supply oxygen to working muscles improved by 13 percent. It didn't matter how fit the subjects were before. The college athletes had similar increas in fitness and fat burning. "Even when interval training was added on top of other exerci they were doing, they still saw a significant improvement," Mr Talanian said.
That said, this was a small study that lacked a control group, so more rearch would be needed to confirm that interval training was responsible.
Interval training isn't for everyone. "Pushing your heart rate up very high with intensive interval training can put a strain on the heart, provoking a heart attack or stroke in people at risk," said Walter R Thompson, professor of exerci science at Georgia State University in Atlanta.
For anyone with heart dia or high blood pressure—or who has joint health problems or is older than 60—experts say to consult a doctor before starting interval training.
Still, anyone in good health might consider doing interval training once or twice a week. Joggers can change between walking and running. Swimmers can complete a couple of fast races, then four more slowly.
There is no single accepted formula for the ratio between hard work and a moderate pace or resting. In fact, many coaches recommend varying the duration of activity and rest.
waves是什么意思
But some guidelines apply. The high-speed pha should be long and hard enough that a person is out of breath—typically one to four minutes of exerci at 80 to 85 percent of their maximum heart rate. Recovery periods should not last long enough for their pul to return to its resting rate.
健康零食
