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Reading

Reading. Three statisticians( 统计学家 ) once visited a garden of red, blue, yellow and white flowers. Reading.

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Reading

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  1. Reading • Three statisticians(统计学家) once visited a garden of red, blue, yellow and white flowers.

  2. Reading One statistician said that if any four flowers were picked, one of them would be red. Another said that if any four were picked, at least one would be blue. The third said that if any four were picked, at least one would be blue.

  3. Reading • Does this necessarily mean that if any four were picked, one would be white?

  4. 反证法 • There are five flowers or more • red2 yellow2 blue1 • red2 yellow1 blue2 • red1 yellow2 blue2 • red3 yellow1 blue1 • red1 yellow3 blue1 • red2 yellow1 blue1

  5. There four flowers • Red 2 yellow 1 blue 1 • Red 1 yellow 2 blue 1 • Red 1 yellow 1 blue 2 • But there’re no white flowers • So we get the conclusion: • red 1 yellow 1 blue 1 and white 1

  6. Fill in the blank • Among all the creatures, _____ are the friends of human beings? animals

  7. Topic • Which kind of animal do you like best? And why?

  8. Your Loyal Friends

  9. We always keep a dog as a pet.

  10. Dogs • If you would really like to enjoy the time with a dog, you will have three steps to go. ChoosingTheBestdog for your self HealthyFoodForDog dogtraining

  11. There‘s one problem with adopting(领养) a dog from an animal shelter The selection of available companions(伴侣) can puzzle(使…迷惑) you! Man‘s best friends come in all shapes, sizes, and, of course, personalities. (个性)

  12. Examine Yourself Choosing the right dog generally means identifying the type of animal that matches your lifestyle and wants.

  13. Breeds • Learn about Different Breeds and Mixes So how do you find out which dogs have the qualities you're looking for?

  14. Learn about various breeds • purebreds（纯种）or mixed breeds (混种)

  15. Purebreds • Of or belonging to a recognized strain established by breeding individuals of unmixed lineage over many generations. • 属于一个几代以来建立在不混杂的生殖个体的链状结构之上的家族的

  16. Features • Their parents and other ancestors are all members of the same breed, are similar to a specific "breed standard."

  17. Advantage • This means that if you adopt a purebred puppy, you have a good chance of knowing about how big he'll get and what general physical and behavioral characteristics he'll have.

  18. Mixed breeds • Descended from two or more breeds.

  19. Mixed breeds • When you adopt a mixed breed, you benefit from the combined traits（特性） of two or more breeds.

  20. Mixed breeds • You also get a dog who's likely to be free of genetic defects（缺点） common to certain purebred dogs.

  21. advantages • So if you know the ancestry of a particular mixed-breed puppy or can identify what type of dog he is (e.g., terrier mix), you have a good chance of knowing how he'll turn out, too.

  22. How good is the animal with children? • Learning about a dog's past through a history sheet or from an adoption counselor can be helpful, but past information isn't always available. In general, an active dog who likes to be touched and is not sensitive to handling and noise is a dog who'll probably thrive in a house full of kids.

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