【单选题】According to the writer, most scientists who had helped in making the A-bomb considered that it should not be used against the Japanese because ______.
【简答题】翻译: The data on human and animal needs currently available are used by nutrition scientists to establish estimates of amounts of essential nutrients per day that will meet the needs of most health peo...
【简答题】Have you seen Jurassic Park? In this film, scientists use DNA kept for tens of millions of years to clone dinosaurs. They find trouble, however, when they realize that the cloned creatures are smarter...