司马迁在整理历史材料时，“采经摭传”，“涉猎者广博”，有书本的，有档案的，有自己采访的，对这些丰富的史料，他尽可能地进行选择和考订。这说明（    ）

“火树银花不夜天，”在喜庆的盛大节日里，人们常常燃放礼花爆竹，此时旁观者最好张口、或闭嘴、堵耳，这种做法主要是为了（  ）

阅读下面短文，从各题所给的A、B、C、D四个选项中选出最佳选项。
C
    It was Sunday. Henry did some shopping and then went to the car park. It was about to start the car when a robber stood up from the back seal. He held a knife to Henry's bead. "Give mc your wallet and drive me to North Street!" he shouted.
    "All right," Henry answered. Then he started the car and drove away. Being 72 years old, be knew he could not fight the young robber. He knew he needed help. Where were the police? As he drove towards each crossing, he looked up and down the side streets, hoping to meet a police car. But he could see none. "Just my luck," he thought. "If I was driving too fast, there would be a police car on every corner."
    So he pushed his foot down on the accelerator (油门), and the car ran much faster. "What are you doing?" shouted the robber. "Keeping off the police," Henry answered. "I thought I saw a police car back there."
    He ran red lights, drove the wrong way on one-way streets. On two way streets he drove on the wrong side of the road. Not one policeman saw him. Again Henry's plan was not working. He had to try a new plan.
    He turned a corner and saw the police station in front. Then he drove his car as fast as he could towards the police gate. The car hit a police motorbike down and stopped. Henry shouted, "Help! Help!" Then he turned back to grab the man's knife. At the same time the policemen heard the shout and quickly caught the robber.

已知：⊙O为Rt△ABC的外接圆，点D在边AC上，AD=AO；

（1）如图1，若弦BE∥OD，求证：OD=BE；

（2）如图2，点F在边BC上，BF=BO，若OD=2$\sqrt{2}$，OF=3，求⊙O的直径．

在下面一段文字的横线处补写恰当的语句，使整段文字语意完整连贯，内容贴切，逻辑严密。每处不超过15个字。

    收藏是分群体的，商人、画家、鉴赏家等不同的群体，①                  ，收藏对他们的意义也不同。多数人将名家之作视为珍品，并赏之、敬之、供之，而徐悲鸿在收藏中体会到，名家之作②                  。他认为一些名家画作在章法、笔墨、投色、造型等方面，也难免有不佳或未足之处。因此他将“古法之佳者守之，垂绝者继之，不佳者改之，未足者增之”这些改良中国国画的理念，引入到对藏品的“改良”中，在鉴赏的基础上，③                  ，以求藏品达到至美，一如他在美术创作中的主张。