2015年12月12日凌晨1:30,一架空客A330从成都双流国际机场起飞,并在11个小时后,于当地时间6:30(北京时间的13:30)飞抵巴黎.成都直航巴黎航线,是成都直飞欧洲的第5条定期客运航线.读成都到巴黎航线示意图,并结合成都、巴黎的气候统计图,完成下列问题.

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bān diǎn |
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A.电流表A(量程0.6A,内阻为0.6Ω)
B.电压表V(量程3.0V,内阻约2kΩ)
C.滑动变阻器R(最大阻值为10Ω)
D.滑动变阻器R′(最大阻值为500Ω)
E.电源E(电动势4V,内阻较小)
F.电键、导线若干


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①可能会引起粮食减产②家具生产厂受到严重影响③可能会引起森林火灾④增强人们在生活中的节水意识
Mr. Brown was going away for a week. Before he left, he said to his son, "if anyone asks for me, you can tell him that your father has been out for doing something, and will be back in a week, then be sure to ask him to sit down for a cup of tea."
"OK, Dad," said his son. But he was afraid his son couldn't remember this, he wrote these words down on a piece of paper and gave it to him. His son put it into his small pocket, took it out and looked at it every now and then.
Four days passed, but no one came to see his father. The boy thought that there was no man to come and that the piece of paper was of no more use for him, so he burnt it that evening.
The next afternoon, someone knocked at the door. The boy opened it. A man was standing at the door and said, "Where is your father?" The boy put his hand into his pocket at once and looked for the piece of paper. He could not find it. He suddenly remembered he had burnt it, so he shouted, "No more."
The man was very surprised. He asked, "No more? I met your father last week. When did it happen?"
"Burnt yesterday evening."
中,
平面
,
,
,
,Q是边
上的一动点,且直线
与平面
所成角的最大值为
,则三棱锥
的外接球的表面积为( )
山行
杜牧
远上寒山石径斜,
白云生处有人家。
停车坐爱枫林晚,
霜叶红于二月花。
远上: 寒山: 石径: 斜: 白云生处:
爱: 枫林晚: 霜叶: 二月花:
your mother in the kitchen?
且在两坐标轴上截距相等的直线有( )
与y轴交于点A,与x轴交于点D,抛物线
与直线
交于A,E两点,与x轴交于B,C两点,点B的坐标为
, 求该抛物线对应的函数表达式.