比例调节规律一般适用于什么场合？

阅读理解。

    Johnny Kelley is 86 years old. He has just run the last eleven kilometers of the Boston Marathon. It took him one hour and fifteen minutes to run the eleven kilometers. After his running, he went to the hospital center. The nurse was surprised and pleased to see that his blood pressure was 139 over 84. She told him that his blood pressure was very good. Then she said, "I wish mine was good like yours . "

    Johnny Kelley is known as the great-grandfather of the Boston Marathon. He ran all the 42 kilometers of the Marathon 61 times. This year was the second time that he has cut back and run only part of it. Kelley holds the record for running more Boston Marathons than anyone else.

    Thousands of people cry "come on" to him as he runs. Kelley smiles and thanks people as he runs. "It's wonderful," he says." People come out to shake my hand. I am welcomed by thousands of people. I think a lot of them thought I ran the whole race. And maybe they congratulate because they know me after all these years and they don't know the other runners. "

1. Johnny Kelley is known as the great-grandfather of the Boston Marathon because ______.

A. he is eighty-six years old

B. he ran all the 42 kilometers of the Boston Marathon that day

C. he was old and ran all the 42 kilometers of the Boston Marathon 61 times

D. his grandson is the best runner of the Boston Marathon

2. When Johnny Kelley said it was wonderful, he meant that ______. 

A. he was welcomed by thousands of people

B. his blood pressure was so good

C. he was able to run the whole Marathon race

D. he got to the hospital center safely

3. Johnny Kelley keeps the record _______ 

A. for living to a great age

B. for running the fastest

C. for taking one hour and 15 minutes to run the 11 kilometers

D. for running the most Boston Marathons

4. Johnny Kelley went to the hospital center after the race ______ 

A. to tell the nurse the good news

B. to have a good rest

C. to thank people who cried '6come on" to him

D. to see if his blood pressure was good

盆栽的植物，一般不宜经常放在卧室内过夜，这是因为

A．生物生活需要营养

B．植物呼吸作用产生二氧化碳

C．生物需要生长

D．植物光合作用释放氧气

近几年来GIS在农业规划和管理，农业疫情防治上得到了广泛应用。图中每一方格代表1km²（该区面积共100km²），三张图分别标示养鸡场空间分布信息、山地和平地空间分布和公路的空间分布信息。该区鸡瘟疫情防治预案中规定：（1）疫情发生后，以发生地为中心半径4km 范围内划为疫区，疫区内所有鸡均需扑杀，如疫情发生地和其它养殖区受地形阻隔，则范围缩小为2km ；（2）疫区通往周边地区的所有路口均需设卡，控制出入人员，严禁家禽外流。据此完成1-2题。

1．若a地发生鸡瘟疫情，则预计需要扑杀的鸡的数量是[ ]

A．27800只        

B．29450只  

C．64050只        

D．77250只

2．a地发生鸡瘟疫情后，图中路口设卡组合正确的是[ ]

A．①②③⑤⑦⑧  

B．①②③④⑦⑧

C．①③④⑤⑦⑧  

D．①②③④⑤⑥

我国银行代理业务存在的主要问题不包括( )。

A．手续费恶性竞争，经营成本明显上升

B．误导现象仍然存在

C．相关法律法规不健全

D．信息化建设滞后