图中这种现象产生的原因是( ) A.地球公转          B.地球

图中这种现象产生的原因是(  )

A.地球公转          B.地球自转              C.五带划分           D.季节变化

答案

B

相关题目

的值是(    ) A.                 B.         
的值是(    ) A.                 B.          C.                     D.
甲型H1N1流感病毒,包含人流感病毒,北美禽流感病毒和北美
甲型H1N1流感病毒,包含人流感病毒,北美禽流感病毒和北美、欧洲、亚洲三类猪流感病毒的基因片段。甲型H1N1流感病毒自产生至今日已经发生了变异,
下列做法正确的是    (   )     A、常用水冲洗铁制品,可
下列做法正确的是    (   )     A、常用水冲洗铁制品,可以防止铁制品生锈 B、长期未用而难开启的铁锁,如向锁孔中加入少量的铅笔芯粉末,就易
下列各句中,没有语病的一句是 A. 《中国人最易读错的字》
下列各句中,没有语病的一句是 A. 《中国人最易读错的字》一书选取近200个中国人最易读错的字,除了从语音的正误方面做出判断外,还对读错的原因
    Every human being has a unique arrangement of the skin on his fingers and
    Every human being has a unique arrangement of the skin on his fingers and this arrangement is unchangeable. Scientists and experts have proved the uniqueness of finger-prints and discovered tha
Both of Jessica’s parents were lawyers and expected her to follow suit. So sh
Both of Jessica’s parents were lawyers and expected her to follow suit. So she went to law school, got a job at a great firm in Washington, DC, and worked as a lawyer for a decade. But her heart
(6分)电磁打点计时器是一种使用交流电源的计时仪器,当
(6分)电磁打点计时器是一种使用交流电源的计时仪器,当电源的频率为50Hz时,振针每隔       s打一个点.现在用打点计时器测定物体的速度,当
(11·西宁)如图8,在6×6的方格纸中(共有36个小方格),每
(11·西宁)如图8,在6×6的方格纸中(共有36个小方格),每个小方格都是边长为1的正方形,将线段OA绕点O逆时针旋转得到线段OB(顶点均在格点上),

最新题目