任务型阅读　　　

The moon landing

　　It's always been man's dream to fly like a bird in the sky. Back in 1865,a French writer once wrote about man's landing on the moon on a special airplane with three people inside, and the first person to touch the ground on the moon would be American. That was considered (被认为) to be a crazy (疯狂的) idea at that time. Over one hundred years later, on July 20,1969,however,this impossible dream did come true.

　　It was a big day in the history of the 20th century. On that day, a special airplane took three brave (勇敢的) men from Cape Kennedy at a speed of 35,533 feet per second. The trip to the moon took 103 hours and 30 minutes. In fact, it was the first time that man ever ”walked” in outer space. On the trip, two of the spacemen spent two hours on the moon walking like flying, and the other stayed in the spaceship. They studied the appearance of the moon. Four days later, the spaceship Apollo 11,returned to the earth and the astronauts were welcomed by people around the country. The man who took the first step, Neil Armstrong, said, “That's a small step for a man, one giant leap for mankind.”This has been said again and again in every language around the world since then.

　　根据短文内容，回答下列问题。

下列化学用语正确的是（   ）

若x₁、x₂是一元二次方程x²―2x―1＝0的两个根，则x₁＋x₂的值等于__________．

2011年2月15日，备受全球关注的苹果股份有限公司，发布了长达25页的《2011年供应商责任进展报告》，首次承认此前发生中毒事件的联建科技和运恒五金是其供应商，以及这两家工厂违规使用有毒原料对工人造成的危害的事实。据了解此次中毒事件的“杀手”是一种分子式为C₆H₁₄的有机物。已知C₆H₁₄有多种同分异构体，则其同分异构体中沸点最高的分子的一氯取代物的种数是(     )

阅读古诗，回答问题

谢公亭^①

李白

谢亭离别处，风景每生愁。客散青天月，山空碧水流。

池花春映日，窗竹夜鸣秋。仿古一相接，长歌怀旧游。

【注释】①谢公亭：谢脁曾在此处送别友人。

请描绘诗中画线句所呈现的景象，并说说这两句透露了作者怎样的心境。