题目

如图，直线y=﹣x+4与x轴交于点A，与y轴交于点B，点C的坐标是（1，0），P为直线AB上的动点，连接PO，PC．（1）求A，B两点的坐标；（2）当△PBO与△PAC面积相等时，求点P的坐标；（3）直接写出△PCO周长的最小值． 答案：【答案】（1）A（4，0），B（0，4）；（2）P（，）；（3）6【解析】（1）根据图象上点的坐标特征求得即可；（2）根据三角形面积公式列出关于x的方程，解方程即可求得；（3）过O作直线AB的对称点O′，连接O′C交AB于点P，此时PC+PO的值最小，最小值为O′C的长，求得O′的坐标，然后根据勾股定理即可 完形填空。      I live in Albuquerque, New Mexico. I used to give a lot of money to the homeless,feeling   1   for them. But as time passed, I became a mom with no home, a huge    2  , and hardly any income. As a result, I  3   giving money to the people on the side of the road and became very  4   .      Things started to change for me   5  . I had a home, a backyard for my daughter,and plenty of food, and I started to   6   myself out of debt. One day we saw a homeless person with the   7 , "Will work for food." I   8  . My daughter commented. "Mommy, you used to always give money to those people in   9  ." I replied, "Honey, they just use that money for  10 , or other bad things." She didn't respond.  11  when I said that, I didn't feel right.      Three days later, I was driving to   12   my daughter from school. A man was standing on the corner, and something deep   13   me said,"Just help the guy." So I  14  down my window, and he ran over excitedly. He said,"God bless you, I only need 77 cents." I  15   into my ashtray (烟灰缸) and strangely enough, there  16  three quarters and two pennies.      I picked them up and gave them to him. He  17  with joy and tears in his eyes."Wow, you just made it  18   for me to see my mom for Christmas! Thank you so much; the  19   that had this great sale is leaving in 20 minutes!" It was a moment I'll  20  forever. I think that man won't forget it either, but I was the one who got the best gift in life-GIVING. (     )1. A. angry      (     )2. A. debt      (     )3. A. continued (     )4. A. rich      (     )5. A. slowly    (     )6. A. save      (     )7. A. determined (     )8. A. ran away  (     )9. A. danger    (     )10. A. life      (     )11. A. And      (     )12. A. bring up  (     )13. A. on        (     )14. A. rolled    (     )15. A. reached  (     )16. A. hid      (     )17. A. stood up  (     )18. A. possible  (     )19. A. plane    (     )20. A. thank    B. sorry      B. burden      B. appreciated B. pleased    B. immediately B. pull        B. sign        B. turned back B. love        B. book        B.So          B. carry out  B. inside      B. pushed      B. went        B. stood      B. turned up  B. meaningful  B. bus        B. respect     C. grateful  C. disease C. hated    C. relaxed C. quickly  C. run      C. child   C. passed by C. need     C. food      C. But      C. pick up   C. behind    C. blew     C. knocked  C. slept    C. set out   C. wonderful C. woman     C. remember  D. strange           D. problem           D. stopped           D. bitter            D. greatly           D. feed              D. advertisement     D. sped up           D. sadness           D. smoking           D. Even              D. take out          D. over              D. took              D. shouted           D. sat               D. burst out        D. interesting       D. man              D. hold