题目

1791年，米被定义为：在经过巴黎的子午线上，取 从赤道到北极长度的一千万分之一。 （1）请由此估算地求的半径R。（答案保留二位有效数字） （2）太阳与地球的距离为1.5×1011 m，太阳光以平行光束入射到地面。地球表面2/3的面积被水面所覆盖，太阳在一年中辐射到地球表面水面部分的总能量 W约为三1.87×1024J。设水面对太阳辐射的平均反射率为7％，而且将吸收到的35％能量重新辐射出去。太阳辐射可将水面的水蒸发（设在常温、常压下蒸发1kg水需选做题：阅读下面短文，并根据短文后的要求答题请注意问题后的词数要求。     Called "The School of the Future" and created with help from software giant Microsoft, a recently-opened public school in Philadelphia, US, is believed to be the first in the world to combine innovation teaching methods with the latest technology. At this school, students work on wireless laptops, teacherseschew traditional subjects for real-world topics and parents can track their children's work on the Internet.      The school, which costs the school district $63 million to build, is free and has no entrance exams. The 170 ninth-grade students were selected at random from l,500 applicants.      Philadelphia School District Chief Executive Paul Vallas told students they would be observed by other schools around the world. "You have become instant role models," Vallas said. "People are going to be watching you."      Students still sit in classrooms, but lessons rely heavily on information found on the Internet and on interactive software. Students will be allowed to learn at their own pace. Homework is done on the computerand sent to the teacher for grading and parents can access to the school's network to read the teacher's feedback on their children's progress.      Traditional education fails to teach students the skills of problem-solving, critical thinking and effective communication, which they need to succeed in the 21st century, Principal Shirley Grover said in an interview. "It's not about memorizing certain algebraic equations (代数方程式) and then presenting them in 8 test," Grover said. "It's about thinking how maths might be used to solve a quality of water problem or how it might be used to determine whether or not we are safe in Philadelphia from the bird flu."      David Terry, 14, said he was hoping to "turn over a new leaf" after discipline problems in his previous school left him with an "average to really bad" academic record. "This is a great opportunity for me," he said. "In other schools, I would not _____." 1. What's the best title of this passage? (Please answer within 10 words.)     ______________________________________________________________________________________ 2. Which sentence in the passage can be replaced by the following one? Although the students have their     lessons in classrooms, they mainly learn through the Internet and on some software.     ______________________________________________________________________________________ 3. Please fill in the blank in the last paragraph with proper words or phrases to complete the sentence. (Please    answer within 10 words.)     ______________________________________________________________________________________4. Do you think this kind of school good? Why? (Please answer within 30 words.)     ______________________________________________________________________________________ 5. Please translate the underlined sentence in the fifth paragraph into Chinese.     ______________________________________________________________________________________