专题一 阅读理解 2.3 主旨大意题——提取主干细归纳-【红对勾】2023版新高考英语二轮复习讲与练

　 　 　 　 讲与练 高三二轮·英语 The lack of possible samples isn􀆳t the only problem. Most insect fossils found in amber are also too young to contain dinosaur blood— dinosaurs were gone by the time the insects became trapped. Many insects went bad from the inside out after they were trapped, leaving nothing inside for scientists to try to find. Finally, the sample would have to be very dry, since DNA can break down quickly in the presence of water. But if researchers did find a perfectly kept mosquito with a body full of dinosaur blood, bringing back its DNA would still be difficult. The blood with the dinosaur DNA would be surrounded by the body of an insect, which has its own DNA. There could also be DNA from the other cells trapped in the amber. Then, of course, there􀆳s the DNA in the laboratory itself— and in the body of the scientist. 9. Why is the film Jurassic Park mentioned at the beginning? A. To introduce the topic of cloning dinosaurs. B. To encourage scientists to clone dinosaurs. C. To give a simple introduction to dinosaurs. D. To stress the possibility of cloning dinosaurs. 10. The key to cloning dinosaurs is to gain 　 　 　 　 . A. insect fossils B. dinosaur DNA C. dinosaur blood D. mosquitoes in amber 11. What is the author􀆳s opinion on cloning dinosaurs? A. It􀆳s a step away from success. B. It will be a fruitless attempt. C. It requires further research. D. It lacks creative work. 12. What can be a suitable title for the text? A. Why was Jurassic Park successful? B. Reasons for dinosaurs