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(本题满分12分)已知椭圆中心在原点,焦点在x轴上,离心率 ,过椭圆的右焦点且垂直于长轴的弦长为 (1)求椭圆的标准方程;(2)已知直线L与椭圆相交于P、Q两点,O为原点,且OP⊥OQ。试探究点O到直线L的距离是否为?若是,求出这个;若不是,说明理由。
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【单选题】Life for Elias was not too bad because____
A.
the prison guards did not beat him
B.
the guards were not clever enough
C.
he could study
D.
he passed the exams after hard work
查看完整题目与答案
【简答题】课文感知 阅读Elias' story,然后完成下面的表格 Write out the right order according to what happened to Elias in the following years. 1.1940:____ A. Elias began school. 2.1942:____ B. Elias was twelve years old and met...
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【判断题】Elias Canetti turned to seek the true meaning of life from the ancient eastern civilization.
A.
正确
B.
错误
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【单选题】How did Nelson Mandela help Elias keep his job?
A.
He talked with Elias’ boss.
B.
He helped him get the correct papers.
C.
He lent him some money.
D.
He asked him to go to court.
查看完整题目与答案
【多选题】以下哪项是阴虚胃痛的主症
A.
胃痛隐隐
B.
咽干口燥
C.
口不渴
D.
舌红苔少
E.
脉细数
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【单选题】A (n) ___________ attitude to life, that is to see the bright side of the life, is usually rewarding.
A.
indifferent
B.
vulgar
C.
optimistic
D.
eccentric
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【单选题】不良反应与用药时间相关性不密切,反应表现与已知该药不良反应不相吻合,原患疾病发展同样可能有类似的临床表现,评为
A.
可能
B.
很可能
C.
可能无关
D.
待评价
E.
无法评价
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【单选题】What does Dr. Elias Aboujaode think of the virtual lifestyles that we are living in?
A.
They change the place where people talk.
B.
They make people dependent more on the Internet.
C.
They have negative effect on real-life relationships.
D.
They make more people interested in online studies.
查看完整题目与答案
【单选题】两侧髂嵴最高点平对
A.
L1棘突
B.
L2棘突
C.
L3棘突
D.
L4棘突
查看完整题目与答案
【多选题】以下哪项是阴虚胃痛的主症()
A.
胃痛隐隐
B.
咽干口燥
C.
口不渴
D.
舌红苔少
E.
脉细数
查看完整题目与答案
相关题目:
【单选题】Life for Elias was not too bad because____
A.
the prison guards did not beat him
B.
the guards were not clever enough
C.
he could study
D.
he passed the exams after hard work
查看完整题目与答案
【简答题】课文感知 阅读Elias' story,然后完成下面的表格 Write out the right order according to what happened to Elias in the following years. 1.1940:____ A. Elias began school. 2.1942:____ B. Elias was twelve years old and met...
查看完整题目与答案
【判断题】Elias Canetti turned to seek the true meaning of life from the ancient eastern civilization.
A.
正确
B.
错误
查看完整题目与答案
【单选题】How did Nelson Mandela help Elias keep his job?
A.
He talked with Elias’ boss.
B.
He helped him get the correct papers.
C.
He lent him some money.
D.
He asked him to go to court.
查看完整题目与答案
【多选题】以下哪项是阴虚胃痛的主症
A.
胃痛隐隐
B.
咽干口燥
C.
口不渴
D.
舌红苔少
E.
脉细数
查看完整题目与答案
【单选题】A (n) ___________ attitude to life, that is to see the bright side of the life, is usually rewarding.
A.
indifferent
B.
vulgar
C.
optimistic
D.
eccentric
查看完整题目与答案
【单选题】不良反应与用药时间相关性不密切,反应表现与已知该药不良反应不相吻合,原患疾病发展同样可能有类似的临床表现,评为
A.
可能
B.
很可能
C.
可能无关
D.
待评价
E.
无法评价
查看完整题目与答案
【单选题】What does Dr. Elias Aboujaode think of the virtual lifestyles that we are living in?
A.
They change the place where people talk.
B.
They make people dependent more on the Internet.
C.
They have negative effect on real-life relationships.
D.
They make more people interested in online studies.
查看完整题目与答案
【单选题】两侧髂嵴最高点平对
A.
L1棘突
B.
L2棘突
C.
L3棘突
D.
L4棘突
查看完整题目与答案
【多选题】以下哪项是阴虚胃痛的主症()
A.
胃痛隐隐
B.
咽干口燥
C.
口不渴
D.
舌红苔少
E.
脉细数
查看完整题目与答案