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问题 填空题

命令LEN("THIS IS MY BOOK")的结果是 【7】 。

答案

参考答案：O

解析：[知识点] 常用函数：字符处理函数，数值计算函数，日期时间函数，数据类型转换函数，测试函数[评析] 求字符串长度函数 语法：LEN(cExpression) 功能：返回指定字符表达式值的长度，即所包含的字符个数(一个汉字占两个字符的长度)。 返回值：Numeric

单项选择题

晶体管调节器是以（），利用发电机端电压的变化来控制晶体管的（），以调节发电机的激磁电流达到自动稳定发电机端电压的目的

A、稳压管为感受元件，导通

B、稳压管为感受元件，导通与截至

C、三极管为感受元件，导通与截至

D、开关二极管为感受元件，导通与截至
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填空题


In the following passage, there are 20 blanks representing the words that are missing from the context. You are to put back in each of the blanks the missing word． The time for this section is 20 minutes.
Where do you really come from And how did you get (1) where you live today DNA studies suggest that all humans today (2) from a group of African ancestors who—about 60,000 years ago— (3) a remarkable journey.
The Genographic Project is seeking to chart new (4) about the migratory history of the human species by (5) sophisticated laboratory and computer analysis of DNA contributed by hundreds of (6) of people from around the world． In this unprecedented and real-time (7) effort, the Genographic Project is closing the gaps of what science (8) today about mankind’s ancient migration stories.
The Genographic Project is a five-year (9) partnership led by National Geographic Explorer-in-Residence Dr. Spencer Wells. Dr. (10) and a team of renowned international scientists and IBM researchers, are (11) cutting-edge genetic and computational technologies to analyze historical patterns in DNA (12) participants around the world to better understand our human genetic roots. (13) three components of the project are: to gather field research data (14) collaboration with indigenous and traditional peoples around the world; to invite (15) general public to join the project by purchasing a Genographic Project Public Participation Kit; (16) to use proceeds from Genographic Public Participation Kit sales to further (17) research and the Genographic Legacy Fund which in (18) supports indigenous conservation and revitalization projects. The Project is anonymous, non-medical, (19) , non-profit and non-commercial and all results will be placed in the (20) domain following scientific peer publication.

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