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（）是指有目的地组织学生进行一定的实际活动以培养他们的良好品德的方法。

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我国人口形势及预测 1980 1985 1990 1992 2000 2010 人口总数(亿人) 9.87 10.58 11.43 11.72 12.84 13.82 城镇人口(亿人) 1.91 2.50 3.02 3.24 4.23 5.16 乡村人口(亿人) 7.96 8.08 8.41 8.48 8.61 8.66 城市人口/总人口(%) 19.4 23.7 26.4 27.6 40.8 55.5 1985年城镇人口与乡村人口的比例为( )。

A. 1:4
B. 1:3
C. 3:1
D. 无法确定

As our van pulled up to the ranch (牧场) to start a three-month program for troubled boys, we passed a cowboy on his horse. Bill was the owner of the ranch. We made eye contact through the dusty window and he winked (挤眼睛) at me and touched the brim of his cowboy hat in welcome.All summer long Bill and his ranch-hands taught us to ride horses, chop wood, and round up cattle. We started to understand the value of working with our hands. Knowing how important it was for boys like me to know that someone believed in them, he trusted us to do the job and do it right. We never let him down.The last day at the ranch, Bill pulled me aside and praised me for the work I had done-- not only on the ranch, but also on myself. He told me if I ever needed anything I could count on him.Four years later, I took him up on that offer. I called him up and asked for a job. I told him how his confidence in me had given me the’ courage to change my life. He offered me a job on the spot. I’m proud to say that each summer I’m the one in the ranch to open the gate for a van full of young men who need someone to believe in them, so they can learn to believe in themselves. By "Four years later, I took him up on that offer" (Para 4), the author means that （）

A. he admired Bill for that offer
B. he offered Bill help in return
C. he accepted Bill’s offer
D. he remembered Bill’s offer

2000年某国商品出口总额2492.11亿美元，比上年增长了27.8%，进口总额4378.27亿美元，比上年增长了35.9%。从地区的情况来看，东部地区出口总额2261.13亿美元，比上年增长27.5%，进口总额2250.96亿美元，比上年增长35.9%；中部地区出口总额为155.38亿美元，比上年增长33%，进口总额2063.50亿美元，比上年增长37.3%；西部地区出口总额75.60亿美元，比上年增长28%，进口总额63.81亿美元，比上年增长7.7%。东部地区进出口总额是西部进出口总额的几倍( )

A. 32.4
B. 42
C. 23.4
D. 4.23

狭义的电子商务特指利用互联网开展的交易或与交易直接有关的活动。

A. 对
B. 错