已知⊙O内有点P，过点P最长弦为10，OP的长是3，过点P弦长为整数_爱下问搜题

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问题填空题

已知⊙O内有点P，过点P最长弦为10，OP的长是3，过点P弦长为整数的弦有______条．

答案

最长的弦是直径为10，1条，

最短的弦为8，1条

∴长度为整数的弦还有9，2条，

∴经过P点的所有弦中长度为整数的有4条．

故答案为4．

阅读理解

One night, when I was eight , my mother gently asked me a question I would never forget. “Sweetie, my company wants to       me but needs me to work in Brazil. This is like your teacher telling that you’ve done        and allowing you to skip a grade(跳级), but you’ll have to       your friends. Would you say yes to your teacher?” She gave me a hug and asked me to think about it. I was puzzled. The question kept me     for the rest of the night I had said “yes” but for the first time, I realized the     decisions adults had to make.
For almost four years, my mother would call us from Brazil every day. Every evening I’d        wait for the phone to ring and then tell her every detail of my day. A phone call, however, could never replace her       and it was difficult not to feel lonely at times.
During my fourth-grade Christmas break, we flew to Rio to visit her. Looking at her large       apartment, I became       how lonely my mother must have been in Brazil herself. It was then     I started to appreciate the tough choices she had to make on       family and work.       difficult decisions, she used to tell me, you wouldn’t know whether you make the right choice, but you could always make the best out of the situation, with passion and a       attitude.
Back home , I       myself that what my mother could do, I could, too. If she        to live in Rio all by herself, I, too, could learn to be       . I learn how to take care of myself and set high but achievable    .
My mother is now back with us. But I will never forget what the       has really taught me. Sacrifices       in the end. The separation between us has proved to be       for me.

C．intelligence

A．Comfortable

A．Interested in

D．satisfied with

A．Depending on

B．supplied with

D．Insisting on

C．independent

多项选择题

骨关节病与摄片体位的组合，正确的是()

A．柯莱斯骨折——腕关节正侧位

B．肱骨外科颈骨折——肱骨外科颈正位

C．腕部舟状骨骨折——腕关节尺偏位(外展位)

D．肩胛骨高位症——肩胛骨正位

E．尺神经沟病变——尺神经沟特殊位