【单选题】A 35-year-old man has had epigastric pain for more than I year. The pain tends to occur 2 to 3 hours after a meal and is relieved if he takes antacids or eats more food. He has noticed a 4-kg weight g...
【简答题】Lesson 3 Listening Comprehension Blank-filling Passage One On January fifth, US Airways flight fif forty-nine was leaving La Guardia airport near New York City. Everything seemed normal and t...