63．The Smithsonian's “Mars Day” might NOT offer people a chance to ________.

　　A．learn about the surface of Mars

　　B．see a test version of some Viking landers

　　C．see meteorites known to have come from Mars

　　D．sit in a spacecraft to experience the life of an astronaut

　　解析：选D。细节理解题。通读全文，可知作者并没有提到在火星日，前往参观的人可以坐在宇宙飞船里体验宇航员的生活，故选D。

　　C

　　Beijing is a rather strange city to many western people.One of my foreign friends told me that when he came to Beijing, at first he couldn't understand why most people wear masks when spring comes to Beijing.He thought people wanted to keep their appearance a secret.Well, one of the symbols of spring coming to Beijing is that more and more people start wearing masks.The reason for it is the arrival of so called “sandstorms”．

　　It is said that each year sandstorms hit Beijing 4 to 5 times.The sand is brought to Beijing by wind from the western part of China.Tons (吨) of soil and dust travel hundreds of miles and blanket Beijing's streets, parked cars and apartment buildings.You would be amazed to see the ground has turned yellow overnight.The storm is so violent that you do not want to have a conversation with your friend on the road.If you open your mouth and then you close it, you may have the raw (自然状态的) taste of sand in your mouth.

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