题目
What is the sky? Where is it? How high is it? These questions are very difficult to answer,-|||-aren`t they?-|||-What color is the sky?" Iexpect you would answer:"Blue."I`m afraid you would be-|||-wrong.The sky has no color.When we see blue,we are looking at blue sunlight.-|||-Is the sky full of air?We know that there is air around the world.We could not breathe-|||-without air.Airplanes could not fly without air. They need air to lift their wings.Airplanes cannot-|||-fly very high because as they go higher,the air gets thinner.If we go far enough away from the-|||-earth,we find there is no air.-|||-Perhaps we can answer some of our questions now.What is the sky? Nothing.Where is it? It-|||-is all around the world.The sky is space.In this space there is nothing except the sun,the moon,-|||-and all the other stars.-|||-Let`s say something about the moon,which is about 384,000 kilometers away from the-|||-earth.An airplane cannot fly to the moon but a rocket can.The rocket is not made of rubber but-|||-strong and light metal.There is gas inside the rocket. The gas is made very hot.When it rushes-|||-out of the end of the rocket,the rocket is pushed up into the air.-|||-Rockets with men inside them have already reached the moon. One day the rockets may be-|||-able to go anywhere in space.-|||-() 41.What is the sky?-|||-A.Heaven. B.Air. C.Space. D.The world.-|||-() 42.What color is the sky?-|||-A.White. B.Blue. C.Gray. D.Colorless.-|||-() 43.Airplanes can`t fly very high because __-|||-A.the air gets thicker B.the air gets thinner-|||-C.they have no wings D.they needn`t air-|||-() 44.Which of the following statements is true?-|||-A.Only rockets can fly to the moon.-|||-B.Neither airplanes nor rockets can fly to the moon.-|||-C.Both airplanes and rockets can fly to the moon.-|||-D.Only airplanes can fly to the moon.-|||-() 45.The rocket is made of __-|||-A.rubber B.heavy metal C.light and strong metal D.hot gas
题目解答
答案
文章大意：本文讲述了天空的的基本性质，如它是什么，它的颜色，它有多高等。文章还介绍了月球的相关情况，并表示只有火箭才能飞到月球。
41. 答案：C
解析：题目问天空是什么，A 天堂，B 空气，C 空间，D 世界，根据文章第四段The sky is space 天空是空间，故选C。
42. 答案：D
解析：题目问天空是什么颜色的，A 白色的，B 蓝色的, C 灰色的，D 无色的，根据文章第二段The sky has no color. 天空是没有颜色的，故选D。
43. 答案：B
解析：题目问飞机不能飞得很高，因为_____, A 空气变得更厚，B 空气变得更薄，C 飞机没有翅膀，D 飞机不需要空气，根据文章第三段第二行Airplanes cannot fly very high because as they go higher, the air gets thinner. 飞机不能飞得很高，因为当它们飞得越高时，空气会变得更稀薄，故选B。
44. 答案：A
解析：题目问以下陈述哪个是正确的，A 只有火箭才能飞到月球，B 飞机和火箭都不能飞到月球，C 飞机和火箭都能飞到月球，D 只有飞机才能飞到月球，根据文章倒数第二段第二行An airplane cannot fly to the moon but a rocket can. 一个飞机不能飞到月球，但是一个火箭可以，故选A。
45. 答案：C
解析：题目问火箭是什么制成的，A 橡胶，B 重金属，C 轻的，结实的金属，D 热气。根据文章倒数第二段第二行The rocket is not made of rubber but strong and light metal.火箭不是橡胶制成的，而是由结实的轻金属制成的，故选C。
解析
步骤 1：理解问题
文章讲述了天空的基本性质，如它是什么，它的颜色，它有多高等。文章还介绍了月球的相关情况，并表示只有火箭才能飞到月球。
步骤 2：回答问题
1. 问题问天空是什么，根据文章第四段The sky is space 天空是空间，故选C。
2. 问题问天空是什么颜色的，根据文章第二段The sky has no color. 天空是没有颜色的，故选D。
3. 问题问飞机不能飞得很高，因为_____, 根据文章第三段第二行Airplanes cannot fly very high because as they go higher, the air gets thinner. 飞机不能飞得很高，因为当它们飞得越高时，空气会变得更稀薄，故选B。
4. 问题问以下陈述哪个是正确的，根据文章倒数第二段第二行An airplane cannot fly to the moon but a rocket can. 一个飞机不能飞到月球，但是一个火箭可以，故选A。
5. 问题问火箭是什么制成的，根据文章倒数第二段第二行The rocket is not made of rubber but strong and light metal.火箭不是橡胶制成的，而是由结实的轻金属制成的，故选C。
文章讲述了天空的基本性质，如它是什么，它的颜色，它有多高等。文章还介绍了月球的相关情况，并表示只有火箭才能飞到月球。
步骤 2：回答问题
1. 问题问天空是什么，根据文章第四段The sky is space 天空是空间，故选C。
2. 问题问天空是什么颜色的，根据文章第二段The sky has no color. 天空是没有颜色的，故选D。
3. 问题问飞机不能飞得很高，因为_____, 根据文章第三段第二行Airplanes cannot fly very high because as they go higher, the air gets thinner. 飞机不能飞得很高，因为当它们飞得越高时，空气会变得更稀薄，故选B。
4. 问题问以下陈述哪个是正确的，根据文章倒数第二段第二行An airplane cannot fly to the moon but a rocket can. 一个飞机不能飞到月球，但是一个火箭可以，故选A。
5. 问题问火箭是什么制成的，根据文章倒数第二段第二行The rocket is not made of rubber but strong and light metal.火箭不是橡胶制成的，而是由结实的轻金属制成的，故选C。