题目内容
What is true about the research mentioned in the beginning of the passage？
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What is true about the study of 1,000 people born in 1920？
A．typicallyB．simplyC．fairlyD．perfectly
听力原文： The first step in exercising for most people is determining whether or not they should. This is particularly true with anyone over thirty-five, especially if they have been heavy smokers. (33) Likewise, young adults who have been very inactive should process slowly and with caution. A physical evaluation from a physician is recommended, preferably one that includes an exercise-stress test. While a person is exercising, a stress test detects cardiovascular (心血管的) problems that might not show up when the body is at rest. This is done by monitoring blood pressure, pulse rate, oxygen consumption, and the hearts electrical activity while exercising.
Whatever exercise program is selected, (34) it is important to start with warm-up periods. These should include stretching exercises, jumping jacks, or active walking. The idea is to increase heart rate and circulation slowly without placing a sudden strain on the heart or the muscles that are starting to work. The next phase in developing an exercise program is to determine the amount of exercise that is enough to condition the muscles and cardiovascular system without overly straining the body. This involves taking one's pulse and finding one's target zone.
(35) This target zone, or safe-training pulse rate, is established by subtracting one's age from 220 and then taking 60 percent to 80 percent of that total. If you are just starting to exercise, 60 percent is recommended; 80 percent is recommended if you are already in good condition.
Questions:33. What should the inactive young adults do when they decide to do exercise？
34.What does warm-up exercise exclude？
35.What would be the suggested the safe-training pulse rate if you are a beginner and at the age of 45？
(30)
Section B
Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听力原文： (30) "Marginal" lands might have low quality soil. Or they might be on a hillside that rises sharply. Or they might be in an area that gets limited rainfall. In any case, they are the last to be planted under good conditions and the first to be abandoned under bad conditions.:
But there are uses for marginal lands. Most often they are used as grasslands for cattle, sheep or goats. A farmer might use native grasses or non native seeds. Either way, it is important to establish good ground cover to avoid the loss of soil through erosion. But using marginal land for grazing is not as simple as it might sound. Cattle can damage forage(草料) crops by eating down to the roots. Their weight also crushes the soil. That can make the ground too hard for growing. (31) A way to reduce the damage from overgrazing is to move animals from one field to another. Experts say rotational grazing like this is extremely important for marginal land.
Another use for marginal land is for tree crops. Trees help support the soil. They reduce the damaging effects of wind and rain. And they can provide grazing animals with shade from the sun. Studies have shown that white pines grow well on marginal land. They grow fast and provide good quality wood. There are slower-growing trees like the black walnut that provide a nut crop as well as wood. Marginal lands need care. Failing to take care of them might only make a bad situation worse. But good planning can turn a marginal resource into a highly productive one.
Questions:30. Which of the following is a marginal land？
31.According to the speaker, how to reduce the damage on marginal lands from overgrazing？
32.Which of the following is NOT the advantage of planting trees on marginal land？
(27)
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