题目

设，，…，是正实数，，且．则______． 答案：【答案】2011【解析】由柯西不等式知．由于等号成立，故．从而，．因此，．Mr. Smith lived in a village. He had ___36__ farms and about twenty people working for him. He often told them _37_ hard and be honest. (诚实的). One day he went to a farm and worked with the workers there. Soon it was time __38___ lunch. He put ___39___ nice bread on the table and ___40___. A few minutes later he came back again but he ___41____ find the bread. ‘Who ate ___42__ on the table?’ he shouted. Some of the workers answered, ‘We ___43___.’ The others said, ‘We saw nothing.’ ‘Well,’ said Mr. Smith, ‘__44___ are a lot of mice in the rooms, you know. So I ___45___ some poison in the bread. ___46___ they eat, they must die. Then I can kill them.’ As soon as he finished, four workers began to cry. ‘Oh, dear!’ ‘___47___?’ asked Mr. Smith. ‘We ate the bread when you were out. We are going to die.’ One of them cried. ‘___48___,’ Mr. Smith said _49___ a smile, ‘I only ____50_____ you. Use your head.’ 1. A．a few B．few C．little D．a little 2. A．work B．working C．worked D．to work 3. A．in B．at C．for D．with 4. A．two B．many C．a D．some 5. A．went out B．came in C．entered D．got in 6. A．shouldn’t B．couldn’t C．wouldn’t D．mustn’t 7. A．food B．the bread C．drinks D．apples 8. A．did B．didn’t C．do D．doesn’t 9. A．They B．We C．What D．There 10. A．took B．bought C．put D．needed 11. A．That B．Before C．If D．Until 12. A．How are you B．What are you doing C．Did you have lunch D．What’s wrong with you 13. A．Excuse me B．Don’t worry C．Congratulations D．Great 14. A．with B．for C．in D．on 15. A．have fun with B．play a trick on C．kill D．have lunch with