【題目】2018年3月5日上午9時(shí)，第十三屆全國人大一次會(huì)議第六次全體會(huì)議在人民大會(huì)堂勝利召開，大會(huì)于3月20日上午閉幕。據(jù)此，完成下列各題。

【1】“兩會(huì)”期間，首都北京的晝夜長短狀況是 （ ）

A. 晝夜平分 B. 晝長夜短 C. 晝短夜長 D. 無法確定

【2】為了收看“兩會(huì)”開幕式，在英國倫敦留學(xué)的小王卻要在2018年3月5日凌晨1:00坐在電視機(jī)前收看直播，造成兩地時(shí)差的原因是 （ ）

A. 地球公轉(zhuǎn) B. 兩地時(shí)間觀念不同 C. 地球自轉(zhuǎn) D. 轉(zhuǎn)播時(shí)延誤造成的

【答案】

【1】C

【2】C

【解析】地球在自轉(zhuǎn)的同時(shí)還在不斷地繞著太陽公轉(zhuǎn)，方向都是自西向東，周期是一年，因?yàn)榈厍虻墓D(zhuǎn)時(shí)，地軸始終與平面保持66.5°的夾角，所以太陽直射的地方不同，導(dǎo)致各地出現(xiàn)不一樣的季節(jié)和不一樣的晝夜長短，就產(chǎn)生了季節(jié)變化和五帶的劃分。

【1】由題目可知，兩會(huì)期間是每年的3月5日至19日，此時(shí)地球公轉(zhuǎn)的位置是在冬至日至春分日之間，太陽直射點(diǎn)在南半球，此時(shí)北京的晝夜?fàn)顩r是晝短夜長，故選C。

【2】為了收看“兩會(huì)”開幕式，在英國倫敦留學(xué)的小王卻要在2018年3月5日凌晨1:00坐在電視機(jī)前收看直播，造成兩地時(shí)差的原因是地球的自轉(zhuǎn)導(dǎo)致地球上經(jīng)度不同的地區(qū)地方時(shí)不同，故選C。

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