【題目】讀經(jīng)緯網(wǎng)圖,完成各題
(1)如圖為經(jīng)緯網(wǎng)圖,下列敘述正確的是
A.甲、乙兩圖中,比例尺較大的是圖甲
B.A,B均在南半球,西半球
C.B地的經(jīng)緯度為(23.5°S,126°E)
D.當(dāng)太陽直射B地時(shí),廣州市學(xué)生正午的身影一年中最短
(2)圖中 A點(diǎn)的位置是( , 60°S),B點(diǎn)的正確位置是( , )
【答案】
(1)D
(2)30°W;12 6°E;23.5°N
【解析】由經(jīng)線和緯線相互交織所構(gòu)成的網(wǎng)絡(luò)叫做經(jīng)緯網(wǎng),利用經(jīng)緯網(wǎng)可以確定地球表面任何一個(gè)地點(diǎn)的位置.在經(jīng)緯網(wǎng)上,經(jīng)線的度數(shù)叫做經(jīng)度,若相鄰兩條經(jīng)線的經(jīng)度向東增大,就是東經(jīng),用符號(hào)E表示,若相鄰兩條經(jīng)線的經(jīng)度向西增大,就是西經(jīng),用符號(hào)W表示;緯線的度數(shù)叫緯度,若相鄰兩條緯線的緯度向北增大,就是北緯,用符號(hào)N表示,若相鄰兩條緯線的緯度向南增大,就是南緯,用符號(hào)S表示.讀圖分析可知:(1)甲乙兩圖中,甲圖所跨的經(jīng)緯度廣,其范圍大,比例尺。籄點(diǎn)位于南半球,B點(diǎn)位于北半球;B點(diǎn)的經(jīng)緯度是23.5°N,126°E;當(dāng)太陽直射B地即北回歸線時(shí),廣州市太陽高度最大,其正午影子最短.(2)依據(jù)經(jīng)緯度的判讀,圖中 A點(diǎn)的位置是30°W,60°S;B點(diǎn)的經(jīng)緯度位置是126°E,23.5°N.所以答案是:(1)D;(2)30°W;12 6°E;23.5°N.
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