【題目】貴州一學(xué)校的課外活動(dòng)小組,于某日觀測(cè)到其所在學(xué)校某時(shí)刻的樹影如下圖所示(箭頭表示方位)。據(jù)此完成下面小題。

1此時(shí)該學(xué)校所在地可能為北京時(shí)間(  )

A. 155:30 B. 32118:30

C. 785:30 D. 51012:30

2該日(  )

A. 南極圈內(nèi)極晝范圍最大 B. 塔里木河正值豐水期(夏季)

C. 莫斯科的晝長(zhǎng)比北京短 D. 地球公轉(zhuǎn)速度最快

【答案】

1C

2B

【解析】試題解析:

1】根據(jù)圖示,樹影在西南方,則此時(shí)太陽(yáng)在東北方;另外樹影的長(zhǎng)度明顯長(zhǎng)于樹高,則圖示時(shí)間為上午某個(gè)時(shí)刻。根據(jù)太陽(yáng)直射點(diǎn)北半球時(shí)全球各地(除極晝極夜地區(qū)外)東北日出,推測(cè)此時(shí)為夏半年某一天,則可能為786:30。故選C

2】該日,為北半球夏季,氣溫高,塔里木河的冰川融水補(bǔ)給量最大,處于豐水期。太陽(yáng)直射北半球,北半球晝長(zhǎng)夜短,緯度越高,晝長(zhǎng)越長(zhǎng),北極圈內(nèi)出現(xiàn)極晝現(xiàn)象;莫斯科緯度比北京高,其晝長(zhǎng)比北京長(zhǎng);南半球晝短夜長(zhǎng),南極圈內(nèi)出現(xiàn)極夜現(xiàn)象。此時(shí)地球位于遠(yuǎn)日點(diǎn)附近,公轉(zhuǎn)速度最慢。故選B

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