【单选题】A 57-year old woman has had a cough and pleuritic chest pain for the past 3 weeks. On physical examination, she is afebrile. Some crackles are audible over the left lower lung on auscultation. A chest...
【简答题】Recent research has claimed that an excess of positive ions in the air can have an ill effect on people's physical or psychological health. What are positive ions ? Well , the air is full of ions , el...
【简答题】Begin each day by telling yourself: I shall be meeting with interference, ingratitude, insolence, disloyalty, ill-will and selfishness---all of them due to the offenders’ ignorance of what is good or ...