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一、图示法: [例1]台风经上海附近时,市区吹偏北大风,台风中心在上海的:①东部;②北部;③西部;④南部。 [分析]台风是热带气旋,在北半球是呈反时针方向的大旋涡,画出北半球的气旋图(图略),吹偏北方向大风的是上海,台风中心的方向就一清二楚了。由图可知台风中心在上海东部选①此类选择题,无须思考只要根据题意,把图画准,答案便直观的出现眼前。当然气旋的运动是本题目的思考依据。二、列表法: [例2]当北京时间3月21日12点时全球日期和这一天我国各地昼夜长短情况是:A.全球多一
First, the graphic method: [Example 1] When the typhoon passes near Shanghai, the city winds northerly and the typhoon center is in Shanghai: 1 east; 2 north; 3 west; 4 south. [Analysis] The typhoon is a tropical cyclone. In the northern hemisphere, it is a large whirlpool in the counter-clockwise direction. The cyclone map of the northern hemisphere is drawn (figure omitted). It is Shanghai that winds in the direction of the north. The direction of the typhoon center is crystal clear. The chart shows that the typhoon center selected one such multiple-choice question in the eastern part of Shanghai. There is no need to think that as long as the question is based on the meaning of the image, the answer will appear intuitively. Of course, the movement of the cyclone is the basis for thinking on this topic. Second, the list method: [Example 2] When Beijing time is at 12 o’clock on March 21, the global date and the day and night of the day in our country are: A. More than one global