第26届世界大学生运动会于2011年8月12日至8月23日在中国深圳举行，大运会期间，地球运行到图中的（ ）
A．①段
B．②段
C．③段
D．④段
参考答案：B
解析：
分析：地球围绕太阳公转时，地轴与公转轨道的平面成66.5°的固定倾角，这就使得一年内太阳光线的直射点有规律地在南北回归线之间移动．当太阳光线直射赤道时是北半球的春分日或秋分日；当太阳光线直射北回归线时是北半球的夏至日；当太阳光线直射南回归线时是北半球的冬至日．
解答：从地球公转示意图可知，当地球公转到夏至日时，时间为6月22日前后；当地球公转到秋分日时，时间为9月23日前后；所以第26届世界大学生运动会于2011年8月12日至8月23日在中国深圳举行，大运会期间，地球运行到图中的②段．
点评：本题考查了地球公转的概况，属基础题．
Animals, including insects, don’t have a ‘language’ like ours. They do not ‘talk’ to each other in words and sentences. But if we watch them, we can see that they do have their ways of communicating (交流) with each other. Can you see the rabbit’s tail? When rabbits see this white tail moving up and down, they run away. They know that they are in danger. The rabbit has told them something without making a sound. It has given them a signal. Many other animals use this kind of ‘language’. When a cobra（眼镜蛇）is angry, it raises its head and makes itself look powerful（有力的）. This warns other animals. When a bee（蜜蜂）has found food, it goes back to its home. It cannot ‘tell’ the other bees where the food is by speaking to them, but it does a little dance. This tells the bees where the food is. Some animals ‘say’ things by making sounds. A dog barks, for example, when a stranger comes near. A cat purrs when it is pleased. Some birds make several different sounds, each with its own meaning. Sometimes we human beings speak in the same way. We make sounds like “Oh” or “Ah” when we are frightened or pleased or when we drop something on our toes. 小题1:Which one is TRUE according to the passage?
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