2019年中考真题英语分项汇编专题17 任务型阅读考点4 综合任务Passage 1（2019 哈尔滨）Dinosaurs(恐龙) once lived on the earth for a long time. They suddenly disappeared millions of years ago. What happened to them? Thats still a mystery. People never stop searching for the answer.Some US scientists say it is because there were not enough male(雄性的) dinosaurs. They got this idea after researching crocodiles(鳄鱼).Mother crocodiles lay eggs and later baby crocodiles come out. The local temperature decides the sex(性别) of
