一种自水下向水面翻涌,中心隆起并向四周辐射扩散的水流称漩水。
参考答案:错
To Our Readers (读者) Welcome to the New Century. We have changed many parts of our New Century. Photos are bigger. So you can enjoy the beautiful flowers and clothes better than before. There is more sports news. So you can know more information about sports. There is also a new column (栏目) of English learning and teaching. We are sure it will help you to learn and teach English better. We believe you will find it more intere sting when you read it. In the six years since its founding (成立) in 1994, New Century has become the best English language newspaper (报纸) in our province. Here we want to give our thanks to Mr. Johnson for his help in the past years.
Mr. Johnson is the manager of the newspaper. A. Right.B. Wrong. C. Doesn’t say.
As you know, we have tried our best to develop a modern English language newspaper in our province. We’ve done well. We believe we can do better in the future. We hope you will find our New Century even more interesting. Please write to us and let us know what you think of it. We welcome your suggestions.
如图,以Rt△ABC的三边分别向外作三个等边三角形△ABE、△BCF、△ACD,其面积分别为S1、S2、S3,设Rt△ABC的三边分别为a、b、c,请证明:S1=S2+S3。