出國留學：托福提分試題

　　托福考試越來越接近了，同學們復習得怎樣了?堅持每天練習，最后托福成績一定會提高不少，為了幫助同學們更有效的復習，小編整理了托福提分試題供大家復習。

　　【Introduction】

　　加拿大一項新研究發(fā)現(xiàn)，患二型糖尿病的病人，若能同時做有氧及重量訓練運動，將可顯著地降低血糖。

　　【Section One】Article

　　It‘s no secret that exercise is key to controlling type 2 diabetes — and many doctors already urge their diabetic patients to get active. But it‘s a vague directive: How much exercise is enough? How often? And what kind? The simple answer is that any is better than none — in sum, that‘s what a new study published in the Sept. 18 issue of the journal Annals of Internal Medicine found. But it also found that not all exercise is created equal and that the combination of aerobic exercise and weight training is significantly better for controlling blood sugar than either alone.

　　The elegantly designed study, led by researchers at the University of Calgary and the University of Ottawa, involved 251 patients aged 39 to 70, with type 2 diabetes. The patients, none of whom were regular exercisers, were randomized to one of four groups: aerobic exercise, resistance training, a combination of both, or none. For 22 weeks, the aerobic group worked out for 45 minutes three times a week on the treadmill or stationary bicycle; the resistance-training group spent an equal amount of time on weight machines. The combination group was at the gym twice as long as the other two exercise groups, doing the full aerobic plus weight-training regimens. "We built up gradually to 45 minutes, but it‘s certainly vigorous," says Dr. Ronald Sigal, lead author of the study and associate professor of medicine and cardiac sciences at the University of Calgary. "It‘s not sprinting or maximal exercise like a marathon trainer would do, but for someone who‘s middle-aged and older and very overweight, it‘s fairly strenuous."

　　Overall, researchers saw improvements in blood-sugar control in all the patients who worked out. Compared with controls, patients in the aerobic group had a reduction of .51% in their hemoglobin A1C values — a test that measures blood-sugar control over the previous two to three months (lower is better). The weight-training group had a .38% reduction compared with controls. But the combined exercise group showed further improvements: in those patients, the A1C values went down an additional .46% over the aer

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