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【简答题】
如果 是函数 的一个极值，称点 是函数 的一个极值点.已知函数 （1）若函数 总存在有两个极值点 ，求 所满足的关系； （2）若函数 有两个极值点 ，且存在 ，求 在不等式 表示的区域内时实数 的范围. （3）若函数 恰有一个极值点 ，且存在 ，使 在不等式 表示的区域内，证明： .
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举一反三
【单选题】What was the writer's feeling when he/she had looked around the accommodation?
A.
Despair.
B.
Contentment.
C.
Anger.
D.
Fear.
【单选题】It is claimed here that word processors create______.
A.
a sense of power in the writer's mind
B.
a reluctance in the author to express himself or herself
C.
an illusion as if you were a servant of the machine
D.
a feeling of distance between a writer and his or her work
【单选题】What's the writer's feeling about her trip to Disneyland? The writer_________.
A.
felt terrible
B.
got angry with the guide
C.
accepted everything as a part of her experience
【多选题】Choose the words stating how the writer's father missed his family at that time.
A.
fight the feeling
B.
keep thinking of home
C.
in the worst way
D.
longing for home
E.
miss her formative growth
F.
gnawing at my heart
G.
nominating me of late
【单选题】Scan the passage and tick the writer's feeling about her trip to Disney. The writer feel
A.
felt terrible.
B.
got angry with guide.
C.
accepted everthing as a part of her experience.
【单选题】How is the writer's feeling for her parents?( )
A.
Shocked
B.
Thankful
C.
Embarrassed
D.
Angry
【单选题】The writer's feeling about Tillie is mainly that of( )
A.
gratitude
B.
admiration
C.
sympathy
D.
curiosity
【单选题】习近平总书记在党的十九大报告中指出:“建设现代化经济体系,必须把发展经济着力点放在()上,把提高供给体系质量作为主攻方向,显著增强我国经济质量优势。”
A.
虚拟经济
B.
增长速度
C.
增长幅度
D.
实体经济
【单选题】The whole paragraph 13 from 'I thought I'd used up all my adrenaline to answering the questions' is used to ______.
A.
describe the writer's reflection of what he should have done before the exam
B.
describe the depressed feeling of the writer when knowing he failed in the exam
C.
describe worrying mood in the exam and contradictory thoughts over his work at his philosophical class
D.
describe how sorry the writer was feeling for his not having been working enough for his philosophical class
【单选题】Serving the family with several children in the restaurant added to _______.
A.
the writer's enjoyment of her job as a waitress
B.
the writer's weekly income
C.
the writer's weariness and discouragement
D.
the writer's feeling of helplessness
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