题目

Clara Daly was sitting on an Alaska Airlines flight from Boston to Los Angeles when she heard a worried voice over the loudspeaker: “Does anyone on board know American Sign Language?”Clara, 15 at the time, pressed the call button. An air hostess came by and explained the situation. “We have a passenger on the plane who’s blind and deaf，” she said. The passenger seemed to want something, but he was traveling alone and the air hostesses couldn’t understand what he needed.Clara had been studying ASL for the past year to help blind and deaf people and she knew she’d be able to fing为了保证骨骼的正常生长发育，儿童少年除了多吃含钙、磷多的食物外，还应补充（ ）A. 维生素A B. 维生素B1 C. 维生素C D. 维生素D