【单选题】National Day is a ________ holiday. [ ]
【单选题】Lucy was having a holiday with her friend in a national park ____ she was bitten on the foot by a snake.
【单选题】National Day, people always go out for a holiday. [ ]
【简答题】计算机系统的3个层次结构由内到外分别是硬件系统、系统软件和_______。
【单选题】Independence Day is _______ national holiday in the States --- all government employees get _______ day off.
【单选题】National Holiday is on ________.
【判断题】多奈哌齐、加兰他敏、吡拉西坦等胆碱酯酶抑制药均可用于治疗阿尔茨海默病
【单选题】During _____ National Day holiday, I received _____ endless messages from interested partners but none were suitable. [ ]