已知椭圆的右焦点F与抛物线y2=4x的焦点重合,短轴长为2.椭圆的右准线l与x轴

题型:解答题

问题:

已知椭圆的右焦点F与抛物线y2=4x的焦点重合,短轴长为2.椭圆的右准线l与x轴交于E,过右焦点F的直线与椭圆相交于A、B两点,点C在右准线l上,BCx轴.

(1)求椭圆的标准方程,并指出其离心率;

(2)求证:线段EF被直线AC平分.

考点:椭圆的标准方程及图象圆锥曲线综合
题型:解答题

请根据句子逻辑, 从模块四课本所学的词汇中选用恰当的单词并且使用其正确的形式填空。 

小题1:He will r_______________ our class to take part in the meeting.

小题2:I won’t trust you until you give me the c__________ evidence to support what you say.

小题3:We are lucky that all our classrooms are very well e______________.We have computers, fans, air-conditioners etc.

小题4:This dictionary is for the a_______________ English learners while that one is for the beginners.

小题5:Jim is so c____________________ that he always gets everything ready for the teacher before each lesson.

小题6:We are sure to o____________ all difficulties on our way to success if we are mentally strong.

小题7:Only a m__________ of students are against this plan while most of them support it.

小题8:Jack and Ben had a quarrel yesterday.But now they have found that the quarrel happened because of a m________________ and they have forgiven(原谅) each other.

小题9:Your c_________ on him that he is not an honest person really hurts him.

小题10:What the hero has done will i______________ more people to follow him and offer help to others when necessary.

题型:解答题
在原子核的人工转变中,不仅发现了质子而且发现了中子发现中子的核反应方程是(  )

A.++

B.++

C.++

D.++

题型:解答题

质量控制成分为总黄酮醇苷和萜类内酯的中药是()

A.槐花

B.银杏叶

C.黄芩

D.黄芪

E.葛根

题型:解答题

男性,25岁,因食不洁食物后出现剧烈呕吐和腹泻,同时伴有头晕、四肢湿冷,血压12/9kPa,P100次/分。最主要的处置是()

A.补液

B.利尿

C.强心

D.升压剂

E.抗生素

题型:解答题

建筑项目选址与很多因素有关,中型建筑项目选址时,宜避开下列( )地基。

A.湿陷性黄土
B.膨胀土
C.岩溶(喀斯特)
D.山区不均匀

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