A．10
答案：C
讨论：当点C在线段AB的延长线上时，AC=AB+BC；当点C在线段AB的上时，AC=AB-BC，再把AB=6cm，BC=4cm代入计算可求得AC的长，即得到A、C间的距离．
解答：解：当点C在线段AB的延长线上时，如图，
AC=AB+BC=6+4=10（cm），
即A、C间的距离为10cm；
当点C在线段AB的上时，如图，
AC=AB-BC=6-4=2（cm），
即A、C间的距离为2cm．
故A、C间的距离是10cm或者2cm．
故选C．
| 完形填空。 | |||
| Amy and Helen are in the same class and they often go home together."I'm __1__, "said Amy when she and Helen __2__ home from school. "You're always hungry," said Helen. "We'll have __3__ when we get to my house." When they got to Helen's __4__, no one was at home. Oh, her cat was __5__ at home. "Do you want to__6__ a hamburger?" asked Helen. "That's OK," said Amy. "Well, you are unlucky. There is nothing in the __7__ ." said Helen. At that time the phone rang. "Hi, Mom," Amy __8__ Helen say, "all right, I'll __9__ myself (我自己). Bye." "Oh, my parents are working in the hospital. I have to make dinner by myself," Helen said to Amy."Oh, I have to go home __10__ I'll be late for dinner. See you." said Amy. Then she left Helen's house. | |||
| ( ) 1. A. excited ( ) 2. A. walked ( ) 3. A. somewhere ( ) 4. A. restaurant ( ) 5. A. interesting ( ) 6. A. play ( ) 7. A. computer ( ) 8. A. listened ( ) 9. A. look at ( ) 10. A. or | B. hungry B. got B. nothing B. hospital B. dramatic B. eat B. bowl B. heard B. look for B. and | C. sad C. arrived C. something C. house C. noisy C. make C. bridge C. looked C. look after C. but | D. busy D. entered D. anywhere D. school D. alone D. draw D. fridge D. read D. look like D. with |