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计算题：丙纶缆破断力近似值计算。已知周长9（7/8）寸（直径80mm），强度是多少？

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题目：

计算题：丙纶缆破断力近似值计算。已知周长9（7/8）寸（直径80mm），强度是多少？

答案：

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参考答案：A, B, C

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In Renee Smith's classroom, attendance is up, trips to the headmaster's office are down and students are handing in assignments on time. The Springfield High School teacher says she has seen great ___11___ since adding a few new students to her class – five Labrador puppies and their father.

The seven ___12___ students in Smith's class have a history of discipline ___13___. But since they've started teaching the dogs obedience (顺从), their own ___14___ has improved. A dog trainer Chuck Reynolds ___15___ the students a new trick each week that they then work on with the puppies. At night, the dogs go home with the staff members who have raised them. They get dropped off in the morning, ___16___ a parent would take a child to day care.

Smith said she came up with the idea when her dog had puppies and she saw how ___17___ her own children responded to them. She consulted with school psychologist Kristin Edinger, ___18___ they took the idea-- along with letters from students ___19___the programme -- to the school board. A pet therapist said, "What you are trying to teach is ___20___ and that there are consequences for the decisions you make."

11. A. promotion   B. progress  C. disturbance  D. disappointment

12. A. human   B. dog      C. new       D. Labrador

13. A. problems    B. questions    C. issues    D. troubles

14. A. habit     B. attitude   C. action   D. behaviour

15. A. guides      B. teaches      C. permits     D. aids

16. A. such as       B. much as    C. so that    D. even if

17. A. well     B. quickly    C. poorly     D. carelessly

18. A. but   B. so     C. and     D. because

19. A. revising    B. describing     C. opposing  D. supporting

20. A. self-criticism   B. self-respect  

C. self-control        D. self-importance
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