题目

按照居民收入倍增计划的要求，到2020年我国要实现城乡居民人均实际收入比2010年翻一番，力争中低收入者收入增长更快一些，人民生活水平全面提高。如果2010年我国农民人均纯收入是5 922元，美元兑换人民币的汇率是1∶6.6，且这十年人民币累计升值10%。不考虑其他因素，到2020年我国农民人均纯收入是( ) A.987美元     B.2 000美元 C.1 974美元  D.1 800美元Is Being Active Helpful for Better Grades?For some students, getting better grades can seem like an impossible task sometimes. With the challenges of school, just paying attention in class or studying hard isn't always enough. But what if there were other ways for students to improve their grades? For parents and students who have ever wondered if this is possible, now you can rest easy. Research suggests that a person who likes doing activities can improve their grades.Scientists think that those students who are active are not just exercising their bodies, but also exercising their brains. In turn, they can be able to improve their grades at school.In the most recent study, researchers found that when children played for half an hour each day, they were better at organizing their schoolwork as well as doing project work and learning traditionally ‘difficult’ subjects, such as maths.What does this mean for children who aren't active? Researchers think that if kids don't get enough activities, they are going to be at a disadvantage when it comes to school performance.In the research experiment, a group of children skipped with ropes, played basketball and did a number of other games or exercises. Another group of children didn't do any activities. They took part in testing both before the experiment and after the experiment. Testing was mainly for maths and reading skills. Results showed that the children in the activity group did better on the tests than those who had no activity. All work and no play will not only make Jack a dull (迟钝的) boy, but will also negatively (消极地) affect his grades in school, according to a new study published in the Journal of Pediatrics.Parents complain children today are actually less active and they always worry about their grades. Dr.Belton, an expert, she said: " If you’d like to see your kids do better in school, have them close their books, set down their pencils and go outside to play."1.What does the expression "rest easy" in Paragraph I probably mean?A. Stop worrying B. Keep changingC. Avoid going D. Continue learning2.What does the writer want to tell us?A. Doing more homework can get better marks.B. All work and no play can do better on testing.C. Being active can do better on school subjects.D. Spending more time on exercise can have a better body.3.To help children get better grades, parents should ______.A. ask the researchers for help.B. encourage them to do more activities.C. help them to organize their schoolwork.D. let them solve problems by themselves.