题目

13．已知  则x2+y2的最小值是        ． 答案：5解析：题中不等式组表示的平面区域如图所示x2+y2的几何意义是区域内的点到原点距离的平方，显然|OA|2最小，|OA|2=5Pop star Britney Spears tied the knot with a childhood friend，but their two-day-old marriage was dissolved Monday shortly after Britney filed for an annulment（废除契约／婚约）．She described the marriage as“a joke that went too far，”said one source closed to Spears．“I don’t  even know if she loves him，”the source said．     The 22-year-old diva（most important singer）walked down the aisle at a Las Vegas wedding chapel early Saturday，the reports said，marrying Jason Alexander，also 22，a childhood friend from her hometown of Kentwood，Louisiana whom she had recently begun dating．Spears wore jeans and a baseball cap，and was escorted（护送）down the aisle by a hotel bellman，according to the People．com．The two apparently decided to marry while partying at the Palms Casino Hotel Friday night，and did so at the Little White Wedding Chapel in Las Vegas．The honeymoon was spent at the Palms，but the next night Spears was seen dining with a group that did not include the groom at a hotel steakhouse．Raised in the US south，the pop diva started her career at a television program The Mickey Mouse Club at age 11，becoming a famous teen singer．All four of her CDs．including most recently November’S“In the Zone，”debuted at number one on the charts．56．The underlined phrase at the beginning of the passage mean        ．A．begin to quarrel                                          B．get marriedC．fall in love                                                  D．get divorced57．The news about Spears’s clothes was most probably taken from a（a n）        ．A．newspaper                                                        B．broadcast stationC．internet                                                              D．magazine58．People would have guessed their marriage wouldn’t  last long because        ．A．Spears was seen to have fun without her newly-married groomB．Spears was a person forever changing her mindC．Spears had an odd characterD．Spears had such a kind of history before59．What made Spears most famous in the world is that         ．A．she got married to a man who she just dated for two days．B．she got divorced two days after her new marriage．C．she began to appear on the stage as a teen singer．D．she made great achievements in singing．