优秀备选课件U2Reading5章节幻灯片.pptVIP

Unit2 Cloning It’s the most famous sheep in the world. Do you know how Dolly is different from other sheep? She was cloned while the others were born naturally. It is the copy of another sheep. 2. What is cloning? Cloning is a way of making an exact copy of another animal or plant. 3. Are the following clones the same? If not, what is the difference? NO. The first four are man-made clones, the rest two are natural clones. Reading Write the letter “T”if the statement is true. Write “F”if it is false. 1.Cloning means making a copy of an animal or a plant. 2.Gardeners can make a lot of money by cloning plants. 3.Cloning animals is as complicated as cloning plants. F F T 4. Dolly the sheep was the first successful clone of a mammal 5.Natural clones happen in animals as will as in plants. T T 1.Dolly the sheep_____. A. looked exactly like the sheep that provides the egg. B. was the exact copy of the sheep that provides the nucleus. C. looked like the sheep that gave birth to it. D. had the characteristics of all three sheep. ＊ Reading – II Skimming ( 5ms ) Choose the right answer according to the text. 2. It can be inferred from the passage that a cloned animal_____. A. usually lives as long as the original one B. usually lives longer than the original one C. usually lives longer than the original one D. is usually as healthy as the original one ＊ 3. Which of the following is not an advantage of cloning? Cloning can be used for medical purposes. Large quantities of food can be produced by cloning. Cloning can help keep animals from becoming extinct. Famous persons who have passed away can be cloned. ＊ 4. What is people’s fear about human cloning? Which of the following is wrong? Cloned Hitlers would do harm to the world. Cloned people may be killed at will for medical aid. A woman would have difficulty recognizing her real husband. Men will die out because a woman can give birth to a