假定在某地筛选大肠癌,计划筛查1000例,假定此地本病的患病率为3%,而这种筛检试验

题型:单项选择题

问题:

假定在某地筛选大肠癌,计划筛查1000例,假定此地本病的患病率为3%,而这种筛检试验的灵敏度为90%,特异度为80%,则被筛检出来的阳性者中真病人数是

A.221

B.27

C.194

D.3

E.776

考点:骨外科学主治医师骨外科专业知识骨科主治医师专业知识1
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妊娠早期的黑格征(Hegar'ssign)是指

A.双合诊时子宫呈前屈或后屈位

B.子宫前后径变宽,略饱满呈球形

C.子宫增大变软

D.双合诊检查发现子宫峡部极软,宫颈和宫体似不相连

E.双合诊时感到子宫半侧较另半侧隆起

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下列关于Linux说法中,不正确的是

A.Linux操作系统具有虚拟内存的能力

B.Linux操作系统不是UNIX系统的变种,因此Linux上程序不适合UNIX平台上运行

C.Linux操作系统不限制应用程序可用内存的大小

D.Linux操作系统支持多用户,在同一时间可以有多个用户使用主机

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阅读表达。

     阅读下面短文并回答问题,然后将答案写到相应的位置上。

     [1] Ashley Power's mother bought a computer for her when she was eight. When she was thirteen,

she was surfing the Internet regularly, but she couldn't find anywhere for teenagers to meet and talk. And

one day she thought, "If I had my own website, I'd make it a really interesting site for teenagers."

     [2]So, when Ashley was sixteen, she launched her own website, called Goosehead. She had no idea

how big a success it would be, but three years later, the site was the most successful teen site in the USA! It was getting 100,000 hits every day, and Ashley had about 30 employees.

     [3] After a few years, the website closed down. Then Ashley, who lives in Los Angeles, was asked

to write a book called The Goosehead Guide to Life. The book is about how to design a website and

start a business. It begins with a section called "All About Ashley," where Ashley tells readers what it is

like to be the boss of a company when you are only sixteen. " I was so happy. But it was crazy in a lot

of ways. I got very stressed. I mean, I was only sixteen - I didn't even have a car! If you were sixteen

and you had your own company, you'd be stressed, too!"

     [4] In an interview Ashley gave advice to teenagers who wanted to start their own business, "Just be

strong and have your dreams and work hard at them. And don't listen when _______, because I

heard 'no' a lot. Just keep going until you hear 'yes'!"

1. For what purpose did Ashley create GooseHead?(no more than 10 words)  

_________________________________________________________________________

2. What is the main idea of Paragraph 2? (no more than 6 words)

_________________________________________________________________________

3. According to paragraph 3, what did Ashley do after GooseHead closed down?(no more than 10 words)

________________________________________________________________________

4. How did Ashley feel as a young boss of a company?(no more than 5 words)

________________________________________________________________________

5. Fill in the blank in Paragraph 4 with proper words.

________________________________________________________________________

题型:单项选择题

其他烹煮的果酱、果冻

题型:单项选择题

患者男性,65岁。因左股骨颈骨折拟行股骨头置换术。吸烟史30年,冠心病史12年,五年前因心肌梗死在当地医院住院治疗,近几年偶有劳累后心绞痛发作,含服硝酸甘油和休息后可缓解。体检:身高1.78m,体重75kg;左下肢触压痛,活动受限;心率85次/分,血压:150/90mmHg。心电图示下壁导联病理性Q波,T波低平。实验室检查:空腹血糖7.2mmol/L。

关于围术期心肌缺血的叙述,下列哪些是正确的()

A.心脏收缩期室壁张力是决定心肌耗氧量的最关键因素

B.心肌收缩力是决定心肌耗氧量的最关键因素

C.需氧量增加是围术期心肌缺血的重要原因

D.神经调节是调控冠状动脉血流的最主要因素

E.心内膜下心肌由于距心腔内血液较近,可直接获得氧供,故缺血的发生可能性低于心外膜下心肌

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