发生自然灾害时，为防止交换机拥塞，应采取（）话务控制方法。
A、扩展性控制
B、重选路由
C、保护性控制
D、中继预留
参考答案：C
阅读理解。
Children in America like Halloween(万圣节) very much.In the evening on the 31st of October(十月)
,they put on special clothes.Sometimes(有时) they dress(打扮) like witches and ghosts.Sometimes they
dress like kings and queens.They go to their neighbour's house and knock(敲) at the door.The neighbour(邻居) opens the door.The children say,"Trick or treat (招待)?" The neighbour gives them chocolate or
some fruit(水果). Sometimes people don't give the children any food.Then the children play a trick on them.They put soap(肥皂) on their windows.Children like this special day.They like their bags of sweets(糖果).
阅读短文，根据在文中出现的先后顺序排列下列四幅图，并根据短文内容补全句子或回答问题。(答案写在答题纸上)
图片顺序：1. ______ 2. ______ 3. ______ 4.______
5.Children can get sweets and fruit on Halloween from their ______ .
6.Many children put on ______ clothes on this special day.
7.What does “play a trick" mean(意思是) in Chinese?______
阅读下面这首清诗，然后回答问题。
落花有泪因风雨，啼鸟无情自古今。
故国江山徒梦寐，中华人物又销沉。
龙蛇四海归无所，寒食年年怆客心。
[注]屈大均：文学家，史学家。早年参加抗清斗争，后退隐不仕。其地位与顾炎武、吴嘉纪比肩。屈大均一生跋涉山川，结交前明遗民志士抗清，冀此复明。
（1）本诗抒发了作者怎样的思想感情？突出运用了怎样的表现手法？
____________________________________________________
（2）本诗的颔联和尾联表现出了怎样的语言风格？请任选一联简要赏析。
nd fruit on Halloween from their ______ .