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1、高考英语：写作综合练（三）Tom的父母来中国工作，于是Tom也跟随他们来中国学习。这样的外国学生在中国的学校 里越来越多，他们急于了解中国文化和生活习俗，对一切都很好奇。一天，Tom在网上看 到下面的连环画，不理解，通过电子邮件发给我，让我给他解释一下。词数：不少于120个。词数：不少于120个。如此示他2 Marginal7 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 rai
2、nfall. In any case, they are the last to be planted under good conditions and the first to be avoided 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 grass or non-native seeds. Either way, it is
3、important to establish good ground cover to avoid the loss of soil through erosion.Forage crops like clover and alfalfa could be planted. These members of the legume family provide high protein food for grazing animals. They also improve the quality of the soil.Most plants use up nitrogen. Legumes p
4、ut nitrogen back into the soil. Forage crops also help reduce erosion of the soil.But using marginal lands for grazing is not as simple as it might sound. Cattle can damage forage crops by eating down to the roots. Also, their weight crushes the soil. That can make the ground too hard for growing.A
5、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 lands. We will talk more about rotational grazing next week.Another use for marginal lands is for tree crops. Trees help support the so
6、il. They reduce the damaging effects of wind and rain. And they can provide grazing animals with shade from the sun.Studies have shown that the white pine and loblolly pine are two kinds of trees that grow well on marginal lands. They grow fast and provide good quality wood. Another kind to consider
7、 is the poplar. And 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 that care might only make a bad situation worse. But good planning can turn a marginal resource into a highly productive one.Title： 1.Marginal La
8、nds2 .ofmarginal lands* The soil might 3. They might be on a hillside rising sharply or in an area.4. They are to be planted last under good conditionsand avoidedfirst under bad conditions.5.usemarginal landsBe used for grazing animals.Beusedfor6.Types of plants to grow7.likeclover and alfalfa. Fast
9、-growing trees like the white pine and loblolly pine； The poplar； Slower-growing trees like the black walnut.8.to usemarginal lands Establishing good ground cover. Avoiding the loss of soil through erosion.9.ofthe soil. Helping support the soil. Reducing the damaging effects of wind and rain. 10.gra
10、zinganimals.3Thousands of years ago people guessed the time of day by watching the sun.Later, they found it was easier to tell the exact time by looking at the shadows. Thus, the sundial （日居）was invented.The sundial proved a useful timepiece in sunny weather. However, another type of timepiece was n
11、ecessary for cloudy weather and night time. A sand glass was another common measurer of time. Two glass bottles were connected by a very small opening. The top bottle was filled with sand, which dropped slowly into the bottom one in a certain period of time. Hour glasses were widely used then.Three-
12、minute sand glasses are still used in many homes to time the boiling of eggs.The real ancestor of modern clocks was the water clock. In China, an early water clock was made up of several bowls. Water trickled (滴)from one bowl to another to keep the clock going. Visitors to the Beijing Palace Museum
13、can still see the old water clock showing the time there.In the Middle Ages a waterless clock was invented which worked by means of weights. To keep the weight falling at the same speed, a system of wheels was invented. The pendulum (钟摆)was soon developed to control the speed of the wheels. Thus the
14、 modern form of clock came into being.1. Why are three-minute sand glasses still used in many homes? (No more than 10 words)What was the weight falling speed of a clock kept by in the Middle Ages? (No more than 6 words)2. What was ancestor of a modern clock? (No more than 3 words)How did the water c
15、lock work? (No more than 8 words)答案【参考范文】These pictures remind me of what sometimes may happen in the street. One day, when a child and his father wanted to go to the toy store across the street. The father decided not to go across the zebra crossing as it was a bit far away from where they were. He
16、 said,We can cross from here. Look, follow me. ,zHe jumped over the traffic railing and landed on the fast lane. He was just about to encourage the child to do the same when a policeman came over. The policeman criticized his irresponsible and dangerous behaviour and fined him. The father lowered hi
17、s head and admitted that he was wrong.As we know the father is his sons closest role model. If the father is irresponsible, he may have a bad influence on his son. Parents should be a good example for their children so that they will grow up to become good citizens.1 1. Finding Uses for 2. Features 3. have low quality 4. getting limited rainfall5. Ways to 6. planting/growing tree crops 7. Forage crops 8. Reasons9. Improving the quality 10. Providing shade for3 To measure the time of boiling eggs.1. A system of wheels.2. The water clock.3. Through water trickling from one bowl to another.