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歡迎您訪問(wèn)數(shù)學(xué)考題練習(xí):下面四幅圖是小剛一天之中在學(xué)校觀察到的旗桿的影!

數(shù)學(xué)考題練習(xí):下面四幅圖是小剛一天之中在學(xué)校觀察到的旗桿的影

更新時(shí)間:2024-01-12 14:07:47作者:貝語(yǔ)網(wǎng)校

下面四幅圖是小剛一天之中在學(xué)校觀察到的旗桿的影子,請(qǐng)將它們按時(shí)間先后順序進(jìn)行排列

A.(1)(2)(3)(4)

B.(2)(3)(1)(4)

C.(2)(1)(3)(4)

D.(4)(1)(3)(2)

試題答案

D

試題解析

在不同時(shí)刻,同一物體的影子的方向和大小可能不同,不同時(shí)刻物體在太陽(yáng)光下的影子的大小在變,方向也在改變,依此進(jìn)行分析.

解答:根據(jù)從早晨到傍晚物體的指向是:西-西北-北-東北-東,影長(zhǎng)由長(zhǎng)變短,再變長(zhǎng)的規(guī)律可知時(shí)間先后順序?yàn)椋?)(1)(3)(2).

故選D.

點(diǎn)評(píng):本題考查平行投影的特點(diǎn)和規(guī)律.在不同時(shí)刻,同一物體的影子的方向和大小可能不同,不同時(shí)刻物體在太陽(yáng)光下的影子的大小在變,方向也在改變,就北半球而言,從早晨到傍晚物體的指向是:西-西北-北-東北-東,影長(zhǎng)由長(zhǎng)變短,再變長(zhǎng).

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