在极坐标系中,曲线ρ=3截直线ρcos(θ+π4)=1所得的弦长为______.

题型:填空题

问题:

在极坐标系中,曲线ρ=3截直线ρcos(θ+
π
4
)=1
所得的弦长为______.
考点:圆锥曲线综合简单曲线的极坐标方程
题型:填空题

I had the meanest mother in the world. While other kids ate candy for breakfast, I had to have eggs and toast. Others had cokes and candy for lunch while I had to eat a sandwich. As you can guess, my supper was different from the other kids’. But at least I was not alone in my suffering. My sister and two brothers had the same mean mother as I did.

My mother insisted on knowing where we were at all times. She had to know who our friends were and what we were doing. We had to wear clean clothes every day. Other kids always wore their clothes for days. We reached the height of disgrace(丢脸) because she made our clothes herself, just to save money.

The worst is yet to come. We had to be in bed by 9:00 each night and up at 7:45 the next morning. So while my friends slept, my mother actually had the courage to break Child Labor Law. She made us work. I believed she lay awake all night thinking up mean things to do to us. Through the years, our friends’ report cards had beautiful colors on them, black for passing, red for failing. My mother, however, would merely be content with black marks. None of us was allowed the pleasure of being a dropout.

She forced us to grow up into educated and honest adults. Using this as a background, I’m now trying to bring up my three children. I’m filled with pride when my children think I am mean because now I thank God every day for giving me the meanest mother in the world.

小题1:From the passage we can learn that the writer’s mother was          .

A.not generous at all

B.very strict with her children

C.very mean with money matters

D.very cruel to her children小题2:Which of the following things did the writer hate to do most?

A.Eating differently from other kids.

B.Wearing clean clothes made by mother

C.Going to bed early and getting up early

D.Letting mother know where they were小题3:It can be inferred from the passage that        .

A.the writer worked hard and usually got good grades in studies

B.mother was punished for breaking Child Labor Law

C.all the other kids studied better than the writer

D.the writer’s family lived a miserable life小题4:The passage was written in a        tone.

A.humorous

B.hateful

C.unfriendly

D.angry小题5:Which of the following statements is NOT true according to the passage?

A.Mother tried to save every penny to run her home

B.The writer is very grateful to her mother

C.The writer is severe with her children when bringing them up

D.The wrier hates her mother very much

题型:填空题

个人征信机构拟设立分支机构的,应当符合以下条件()

A.对拟设立分支机构的可行性已经进行充分论证

B.股东关联关系和实际控制人说明

C.最近3年无受到重大行政处罚的记录

D.组织机构设置以及人员基本构成说明

题型:填空题

广义的树皮包括()。

A.历年产生的周皮和各种死亡组织

B.次生韧皮部

C.形成层

D.最后一次木栓形成层和栓内层

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生产成果与资源投入量之比()

A、生态效率

B、系统资源利用率

C、能量效率

D、都是

题型:填空题

所有的筛分装置,无论构造如何,都有筛板或筛网。

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