问题
填空题
已知集合A={x|
|
答案
集合A={x|
＞0}2+x 2-x
={x|
}∪{x|2+x＞0 2-x＞0
}2+x＜0 2-x＜0
={x|-2＜x＜2}∪∅
={x|-2＜x＜2}．
故答案为：{x|-2＜x＜2}．
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已知集合A={x|
|
集合A={x|
＞0}2+x 2-x
={x|
}∪{x|2+x＞0 2-x＞0
}2+x＜0 2-x＜0
={x|-2＜x＜2}∪∅
={x|-2＜x＜2}．
故答案为：{x|-2＜x＜2}．
| The 2005 Talent Show was a night to remember! It was a great __1__ Students, parents, faculty (全 体教员) were dancing, singing, playing the guitar and much more, There were more than thirty __2__ . Pam Cook, the school president, sang a country song. Jason Cruise won the prize for the__3__ performer. When he was interviewed, he said that singing was __4__ interesting to him. He used to sing all the time in his room alone or for his family but __5__ for so many people. The prize for the funniest act __6__ to Paul Black. He danced as a drunken man __7__ music. Hid classmates said he was the __8__ boy in the class. Thanks for the parent and student volunteers for their working making this __9__ show possible. Many thanks for all of people who helped. We look forward to__10__ shows! | |||
| ( ) 1. A. success ( ) 2. A. plays ( ) 3. A. good ( ) 4. A. job ( ) 5. A. always ( ) 6. A. go ( ) 7. A. across ( ) 8. A. smartest ( ) 9. A. talent ( ) 10. A. this year | B. succeed B. games B. better B. work B. often B. went B. without B. easiest B. talk B. this year's | C. successful C. acts C. best C. thing C. sometimes C. got C. through C. funniest C. fashion C. next year | D. succeeding D. lessons D. first D. something D. never D. have D. in D. dullest D. acting D. next year's |