book3Unit8听力答案与文本..doc

Unit 8 Part Two Listening I Although twins have always been a source of curiosity, they are not so uncommon statistically, since they occur once in every 86 births. About one third of all twins are identical, or single-egg twins. Identical twins have the same genes and, hence, the same sex, hair, eyes, blood type, and bone and tooth structure. Some identical twins are mirror images of each other. For example, one may be left-handed, the other right-handed. As young children, some identical twins may develop their own private language. Identical twins have an especially keen intuition, and they often seem to think and dress alike even when away from each other. In fact, even when they are separated at birth and raised apart, identical twins develop surprising similarities. They may pursue the same careers, have the same interests, or die within days of each other. In contrast to identical twins, fraternal twins inherit a separate set of genes and are not necessarily of the same sex. Exercise 1 1.F 2.F 3. T 4. F 5. T Exercise 2 1. genes 2. sex 3. blood 4. tooth 5. mirror 6. left-handed 7. right-handed 8. language 9. young 10. alike 11. separated 12. apart 13. careers 14. interests Listening II When Robert Jones, 19, went to college this fall, he was surprised that so many of his classmates called him Edward. They told him he looked just like a former student, Edward Gallant, and a friend of Gallants discovered they had the same birth date. Both Robert and Edward were adopted. When they talked with each other, they discovered that they were identical twins separated shortly after birth. In fact, they were wrong: They were triplets. After newspapers published their pictures, Edwards mother got a call from David Kellman. Youre not going to believe this, he said, but I believe Im the third. As Baby A, Baby B and Baby C, Robert, Edward and David had been born to the same mother on July 12, 1976. They were adopted by three different couples, none