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【简答题】
已知椭圆 的中心在,焦点在 轴上,长轴长是短轴长的 倍,其上一点到右焦点的最短距离为 (1)求椭圆 的标准方程; (2)若直线 交椭圆 于 两点,当 直线 的方程
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参考答案:
举一反三
【多选题】下列哪些是工业文明带来的危机()
A.
环境污染
B.
资源短缺
C.
森林植被破坏
D.
水资源危机
E.
生物多样性减少
【简答题】Paraphrase the following sentence: "It would certify that he had specialized in pharmacy, but it would further certify that he had been exposed to some of the ideas mankind has generated within its hi...
【单选题】It is these poisonous products _____ can cause the symptoms of the flu, such as headaches and aching muscles.
A.
who
B.
that
C.
how
D.
what
【多选题】淘宝店铺的分类页中通常包含哪些模块
A.
店招
B.
宝贝列表
C.
宝贝分类
D.
宝贝搜索
【简答题】Paraphrase That would settle it; but conversation does not need to be settled; it could still go ignorantly on.
【单选题】Headaches are never associated with dizziness and weakness in a limb or limbs.
A.
Right
B.
Wrong
C.
Not mentioned
【简答题】在地质年代较老的褶皱构造地区常出现背斜成谷、向斜成山的“地形倒置”现象。该图为“地形倒置形成过程示意图”,读图完成24~25题。 小题1:按地形倒置形成的时间顺序,下列排序正确的是       (  ) A.①②③④ B.①④②③ C.③②④① D.①④③② 小题2:下列叙述正确的是(   ) A.图中地形是内外力共同作用的结果 B.岩层弯曲变形越强烈越不利于地形倒置的形成 C.岩层的抗风化能力越...
【多选题】下列哪些是包装工业对环境的污染( )
A.
生产塑料袋产生废气
B.
造纸产生的废水
C.
生产易拉罐产生废气
D.
生产玻璃容器产生废气
【单选题】下列哪些是工业污染源
A.
工厂名称地址企业性质 生产规模
B.
城镇人口 居民区位置及用水量
C.
生活垃圾处理状况
D.
农业用化肥 农药情况
【简答题】Paraphrase: It would certify that he had specialized in pharmacy, but it would further certify that he had been exposed to some of the ideas mankind has generated within its history.
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