阅读下表（表中之数字，表示各时代在各区域中治水事业活动之次数）。据此无法推论的是
| 省份 时代 | 陕西 | 河南 | 山西 | 河北 | 甘肃 | 四川 | 江苏 | 安徽 | 浙江 | 江西 | 福建 | 广东 | 湖北 | 湖南 | 云南 |
| 汉（公元前206～公元221年） | 18 | 19 | 4 | 5 | 1 | 1 | 1 | 4 | 1 | 1 | 1 | ||||
| 隋（598～618年） | 9 | 4 | 3 | 1 | 1 | 1 | 2 | 4 | 2 | ||||||
| 唐（618～907年） | 32 | 11 | 32 | 24 | 4 | 15 | 18 | 12 | 44 | 20 | 29 | 4 | 7 | 1 |
C．水利是传统农业发展的命脉 D．经济重心由北方向南方转移
答案：A
题目分析：本题主要考查学生阅读数据表格，提炼有效信息的能力，通过表格中的数据分布可以得出黄河治理是古代治水的重点，如汉唐时期陕西与河南的治理次数一直都很高，唐朝时江苏、安徽、浙江、江西、福建的治理次数也很高，也反映了经济重心的南移，联系我国古代农业发展的特色，可知水利是传统农业发展的根本，据此分析可知BCD均符合题意，而A的表述在题干中无法反映，故选A。
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| Two friends went to a city and 1 in a big hotel. Their room was on the 56th floor, and there was a fast lift, so they went up and down very 2 . They came back to the hotel very late one Saturday 3 ,and the liftman said to them," The electricity (电) stopped today. You can't 4 the lift now, " The two friends said. "We 5 to go upstairs (上楼) to our room." They left their coats downstairs because they were 6 , and began to climb. It took a 7 time, but they sang some interesting songs. At 12:00, they 8 the 56th floor. Then one of them put his hand in his pocket (口袋) and stopped. He said to 9 , "Now. I'm going to sing the most interesting song of all. Its name is: I 10 the key to the room downstairs in my coat." | ||||
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