先化简，再求值：m2-2mn+2（m2+mn-n2），其中m=-2，n=3． 发布时间：2017-05-19 20:58 │ 来源：www.tikuol.com 题型：解答题 问题： 先化简，再求值：m2-2mn+2（m2+mn-n2），其中m=-2，n=3．
题型：解答题 完形填空。 Table tennis is very popular in China. That is to say, people of all l like playing it. But I like baseball best. Sam is my good friend. His favorite sport is 2 , and he knows about Deng Yaping, Wang Nan and Zhang Yining well. 3 he doesn't know about any famous baseball 4 . Baseball is 5 of the most popular sports in the USA. Childrenplay baseball in fields or parks. Each team 6 nine players. The baseball season usually 7 from April co September. 8 that time, there arc many baseball matches on TV. Many people will 9 them. At the end of' the game season, the two top(一流的) teams play 10 each other. Sport is an important part of our life. What is your favorite sport? Can you tell me?( )1. A. names ( )2. A. table tennis( )3. A. And ( )4. A. matches ( )5. A. a ( )6. A. has ( )7. A. begins ( )8. A. Into ( )9. A. visit ( )10. A. with B. countries B. soccer B. But B. fans B. the B. have B. starts B. During B. watch B. at C. ages C. baseball C. Or C. sports C. one C. there is C. lasts C. On C. look C. to D. times D. tennis D. If D. players D. that D. there has D . plays D. To D.look at D.against 查看答案