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一、选择题(50分) 1.3月21日,某地正午的影子和杆子等长,该地可能位于: A.中国境内的东北平原上;B.45°S的纬线上;C.阿根廷境内;D.50°N。( ) 2.地球自转产生的现象是: A.恒星日比太阳日长3分56秒;B.日、月、星、辰东升西落;C.地球是一个两极略扁,赤道稍微突起的椭球体;D.地球上产生昼夜现象。( ) 3.海南岛的三亚市(18.5°N)在下列日期中,正午太阳高度最大的是: A.6月5日;B.7月5日;C.8月5日;D.9月5日。( ) 4.在下列地区,地球自转的线速度从小到大依次排列正确的是: A.密西西比河河口、恒河河口、刚果河河口、亚马孙河河口;B.冰岛、纽芬兰岛、台湾岛、加里曼丹岛;C.
First, multiple-choice questions (50 points) On March 21st, the shadows and poles at noon of a certain place are equal in length, and this place may be located on: A. On the northeast plain in China; on the weft of B. 45°S; C. In Argentina ;D.50°N. () 2. The phenomena that result from the rotation of the Earth are: A. The sun is 3 minutes 56 seconds longer than the sun; B. The sun, moon, stars, and stars fall east and west; C. The earth is a bit bipolar and the equator is slightly raised. The ellipsoid; D. The phenomenon of day and night occurs on the earth. () 3. Sanya City, Hainan Island (18.5°N) On the following dates, the maximum solar altitude at midday is: A. June 5; B. July 5; C. August 5; D.9 On the 5th of the month. () 4. In the following regions, the line speeds of the Earth’s rotation are ranked correctly from small to large: A. Estuary of the Mississippi River, the estuary of the Ganges, the estuary of the Congo River, and the estuary of the Amazon; B. Iceland, Newfoundland, Taiwan Island Kalimantan Island; C.