【单选题】A study is conducted of patients who are infected with hepatitis virus A, B, C, D, or E. The patients are categorized according to the type of virus and are followed over the next 10 years. They recei...
【多选题】(教材对话原文) Michael: They are testing the 3D printer. Don’t you come and see it? Lucas: What? Never heard of it. Michael: It is one of the most latest technological innovations. Lucas: Really?{A; B; C; D...
【简答题】Questions 3 and 4 are based on the news report you have just heard. 3. A) Testing the efficiency of the new solar panel. B) Providing clean energy to five million people. C) Generating electric power ...