设每台电脑在一年内需要修理的概率为0.02，某单位有50台这种电脑。则在一年内需要修

发布时间：2017-05-19 17:55 │ 来源：www.tikuol.com

题型：单项选择题

问题：

设每台电脑在一年内需要修理的概率为0.02，某单位有50台这种电脑。则在一年内需要修理的电脑不多于两台的概率为（）.

A．0.364

B．0.372

C．0.186

D．0.922

考点：质量工程师初级质量专业基础理论与实务概率统计基础综合题

题型：单项选择题

完形填空。
How can we learn to write in English? I think learning to write well takes lots of 1 . Keeping a 2 is one way to practice. Writing lots of e-mails in English is another good way. Also reading English can help you 3 your writing , as you see many examples of good writing. Any book, magazine or newspaper can 4 many examples of good writing. 5 books, magazines or newspapers, students also need to see examples of writing which are 6 to their own writings. Try going to some composition webs, and you will find examples of students' compositions. These compositions may be not 7 , but they are good examples of how to make your writing 8 . After reading these compositions, try reading some of your own writings again. Can you find 9 grammar mistakes when you read them again? Can you think of some better word 10 ? Do you think you have good, pecific (确切的) examples? Try this way again and again, and you' ll make it.
( )1. A. reading ( )2. A. training ( )3. A. improve ( )4. A. have ( )5. A. However ( )6. A. according ( )7. A. perfect ( )8. A. better ( )9. A. no ( )10. A. spelling	B. writing B. diary B. make B. take B. Especially B. similar B. bad B. longer B. all B. choices	C. practice C. interest C. enjoy C. provide C. also C. next C. better C. shorter C. some C. usage	D. exercise D. thoughts D. care D. write D. besides D. as D. worse D. cleverer D. any. D. meaning

查看答案

题型：单项选择题

元素周期表中某IIA族元素原子序数为x，那么同一周期的IIIA族元素原子序数不可能为（）

A．x+25

B．x+1

C．x+11

D．x+10

查看答案

题型：单项选择题

不同的民居特点反映了所在地区的地理环境特点。下列民居图位于我国南方地区的是

查看答案

题型：单项选择题

某年某社区开展为期一年的糖尿病普查，该社区年初人口数9500人，年末人口数10500人。年初有糖尿病病人100人，年未有糖尿病病人130人，普查期间有10名患者死于糖尿病并发症。

该社区普查当年的糖尿病患病率为

A．130/10500

B．130/10000

C．140/10000

D．140/10500

E．40/10000

查看答案

题型：单项选择题

监考员在答题卡上贴错条形码，应如何处置（）。

A、通知场外监考员到考务办公室领取备用条形码

B、监考员到考务办公室领取备用条形码

C、贴在原贴错的条形码上，将其覆盖

D、在备用条码上写上考生姓名和准考证号

E、将此情况如实填入《考场情况记录表》中相应栏目

查看答案

更多题库