题目

 My father wants to know _________ next week .           A．when my uncle leaves     B. when will my uncle leave           C．when my uncle will leave   D．when does my uncle leave 答案：C地表点Q与太阳直射点所在纬线之间的纬度差为α，其正午太阳高度为H。若H等于α，则Q点的纬度变化范围是A．21.5°至68.5°B．11.5°至68.5° C．21.5°至78.5°D．11.5°至45°