sun is called a solar eclipse ()It occurs when the moon passes directly in front of the sun.As seen from various points on the earth,the moon blocks out the sun.An eclipse ofthe moon is called a lunar eclipse )It occurs when the full moon passes behind the earth into the earth's shadow.Within the shadow the moon is no longer directly lighted by the sun.When the whole moon or the whole sun is eclipsed,we speak of a total eclipse ()When only part of the moon or sun is eclipsed. we speak ofa partial eclipse(偏食) (4)Playing Cards A pack of ordinary playing cards consists of four 13-card suits: clubs,diamonds,hearts,and spades.Each suit contains a king queen. jack,and 10 cards assigned numbers from 1 to 10.The 1-card is known as an ace.An order of rank for the various cards within a suit is established for each game.In bridge,for instance,ace is the highest,followed by the king,queen,etc. 3.Introductory Remarks Why Do We Believe That the Earth Is Round"is one of a series of short essays Orwell wrote for British periodicals in the 1940's.In it he first tries to refute both the Flat Earth theory and the Oval Earth theory but says that his reasons for thinking that the earth is round are rather weak and precarious.Then from the discussion he draws his conclusion that ours is a credulous age because much of our knowledge does not rest on reasoning or on experiment,but on authority.Here Orwell expresses a healthy concern for the burden the ordinary newspaper-reading citizen carries.Overloaded with information and misinformation,the average man cannot adequately process and digest what he receives.He is apt to accept what he hears or reads as true without submitting it to factual verification or the test of reason.Man should respect the views of true3 sun is called a solar eclipse (日食). It occurs when the moon passes directly in front of the sun. As seen from various points on the earth, the moon blocks out the sun. An eclipse of the moon is called a lunar eclipse (月食). It occurs when the full moon passes behind the earth into the earth’s shadow. Within the shadow the moon is no longer directly lighted by the sun. When the whole moon or the whole sun is eclipsed, we speak of a total eclipse (全食). When only part of the moon or sun is eclipsed, we speak of a partial eclipse (偏食). (4) Playing Cards A pack of ordinary playing cards consists of four 13-card suits: clubs, diamonds, hearts, and spades. Each suit contains a king, queen, jack, and 10 cards assigned numbers from 1 to 10. The 1-card is known as an ace. An order of rank for the various cards within a suit is established for each game. In bridge, for instance, ace is the highest, followed by the king, queen, etc. 3. Introductory Remarks “Why Do We Believe That the Earth Is Round” is one of a series of short essays Orwell wrote for British periodicals in the 1940’s. In it he first tries to refute both the Flat Earth theory and the Oval Earth theory but says that his reasons for thinking that the earth is round are rather weak and precarious. Then from the discussion he draws his conclusion that ours is a credulous age because much of our knowledge does not rest on reasoning or on experiment, but on authority. Here Orwell expresses a healthy concern for the burden the ordinary newspaper-reading citizen carries. Overloaded with information and misinformation, the average man cannot adequately process and digest what he receives. He is apt to accept what he hears or reads as true without submitting it to factual verification or the test of reason. Man should respect the views of true