【简答题】Roman soldiers in some places built long rows of signal towers. When they had a message to send, the soldiers shouted it from tower to tower. If there were enough towers and enough soldiers with loud ...
【单选题】In the passage below, the word they refers to: Bernays then sent the results of the survey to 5,000 other doctors, along with a brochure suggesting that bacon and eggs were an excellent "large breakfa...