题目

下面是按一定规律排列的一列数： 第1个数：； 第2个数：； 第3个数：； …… 第个数：． 那么，在第10个数、第11个数、第12个数、第13个数中，最大的数是（ ）A．第10个数B．第11个数C．第12个数D．第13个数 3．已知：a为有理数，a3+a2+a+1=0，求1+a+a2+a3+…+a2012的值． 4．已知：，，求ab的值。 5．当整数k为何值时，方程9x-3=kx+14有正整数解？并求出正整数解 One day people heard a shout for help. They h 1.to the river, and saw a man in the water. A young fisherman jumped i 2.the river and s 3. to that man. Soon he pulled the man to the bank and carried him out of the water. All the people nearby praised theb 4.and kind man.Now people found the man out of the water was the r 5. man in the town, he went over to the young fisherman and said, “Young man, you saved me, d 6.you? Thank you very much. I’d like top 7. you for your kindness.”He took out five cents and wanted to give it to the young man. Everybody was angry w 8. the rich man. Just then, an old man said to the young fisherman, “T 9. the five cents, young man. The rich gentleman’s life is w 10. just that much.