现需要测算城市中A、B、C三点的繁华影响度分值，A点位于城市中心，B点距市中心5km，C点距市中心10km，已知三地块只受单中心影响，市级功能影响的作用分为10，半径为20km，区级功能影响的作用分为6，半径为8km，街级功能影响的作用分为3，半径为2km，则A、B、C三地的繁华度影响分各为（）。
A.19，16，10
B.19，19，16
C.10，6，3
D.16，6，3
参考答案：A
解析：A点10+6+3=19；B点10+6=16；C点10。因为A受三个中心的影响，B受两个中心的影响，而C根据影响半径，只能受市级中心的影响，所以只能是10。
| 阅读理解。 | |
| Blood Donation (献血) A grown-up person has ten or eleven pints (品脱) of blood inside his or her body. We can lose a pint of blood without feeling, but if we lose too much blood, we feel weak and cold. Our faces become pale. We may die. This is what often happen when somebody is hurt in an accident, or a soldier is hurt in a war. 1______ But today they can be taken to hospital and given more blood. Almost at once they feel better. their faces are no longer pale. They do not die. 2______ People may donate blood to a blood bank so that it can be used to save people's lives. When they go to donate blood, a special kind of needle(针) is put into the arm. It does not hurt. The blood runs through the needle and through a rubber tube (橡胶管) into a bottle or a bag. A pint of blood is taken in this way. The person who has given blood drinks a cup of tea of coffee and rests for a few minutes, then he feels well. 3______ A person who gives blood feels happy, because he knows that his blood will be used to someone's life. 4______ When you are older, you may give blood, too. But you can't do this until you are eighteen. | |
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| 5. A person who gives blood feels happy, because ______. | |
| A. he knows his blood maybe save someone's life. B. he gets a lot of money. C. He knows that his blood is very good. D. He can drink a cup of tea or coffee and rests. |