一架直升机在一片梯形的树林（如图）上空喷洒药水，这片树林的面积是多少平方千米？合多少公顷？

C

    Do you like traditional Chinese paper-cutting? Ding Xiang, a student at Nongsishi Middle School in Xinjiang, is really good at it. At the eighth National Excellent Talents Competition last month in Beijing, the 15-year-old girl got the gold award（金奖） for her paper-cutting skills.

    At the competition, Ding cut a piece: Millennium Dream（千年梦想）. The piece has two papers. One shows an ancient cave painting(壁画) and the other a Chinese-made spaceship. The two papers form a sharp contrast（对比）. Ding said she wanted to show three things with the piece: China's long history, China's rapid development, and her hope for the future of paper-cutting. This piece helped Ding walk away with the gold award.

    "I was very surprised to get the award." Ding said in an interview with Yili Daily, a Xingjiang newspaper. "I should thank paper-cutting for bringing me the award."

    All the hard work has paid off. In two years, Ding's skills have improved a lot, and she has the gold award to prove(证明) it.

    Ding said she has learned a lot from paper-cutting. "I have learned to observe things carefully," Ding told Yili Daily. "I have become more confident, too. It is a great help in my studies. Also, I have learned a lot of history from the art."

①建立西汉       ②巨鹿之战       ③垓下之围            ④建立张楚政权

读课文《莲叶青青》，回答

看了一会儿，她醒过神来，赶快拿一把剪刀，走到荷花缸边，咔的一声，剪下一枝最大的荷叶。从“醒过神来”你能体会到什么？

    There are two factors (因素) which decide an individual's intelligence (智商). The first is the sort of brain he is born with. Human brains differ greatly, some being more capable (有能力) than others. But no matter how good a brain he has to begin with, an individual (个体) will have a low order of intelligence unless he has opportunities to learn. So the second factor is what happens to the individual—the sort of environment in which he is brought up. If an individual has less chances environmentally, it is likely that his brain will fail to develop and he will never arrive at the level of intelligence of which he is capable.

    The importance of environment in deciding an individual's intelligence can be shown by the case history of the twins. When they were three months old, their parents died, and they were placed in different homes. Peter was brought up by parents of low intelligence in a separate community with poor educational opportunities. Mark was brought up in the home of well-to-do opportunity to be encouraged intellectually.

    This environmental difference continued until the twins were in their late teens, when they were given tests to measure their intelligence. Mark's IQ was 125, twenty-five points higher than the average and fully forty points higher than his twin brother. Given equal opportunities, the twins, having similar brains, would have tested at roughly the same level.