《智能变电站合并单元测试规范》规定,合并单元和电子式互感器的数据通信参照GB/T18

题型:填空题

问题:

《智能变电站合并单元测试规范》规定,合并单元和电子式互感器的数据通信参照GB/T18657.1的()的固定长度帧格式。

考点:高校实验室安全考试电气电气题库
题型:填空题

已知f(x)=x2-ax+4.

(1)当a=2时,解不等式f(x)>x+14;

(2)若f(x)≤0对x∈[1,4]恒成立,求a的取值范围.

题型:填空题

建筑安装工程费由( )组成。

A.直接工程费、间接费、计划利润和税金

B.直接工程费、间接费、法定利润和税金

C.直接费、间接费、计划利润和税金

D.直接费、间接费、利润和税金

题型:填空题

For many people today, reading is no longer relaxation. To keep up their work they must read letters, reports, trade publications, interoffice communications, not to mention newspapers and magazines: a never ending flood of words. In (1) a job or advancing in one, the ability to read and comprehend (2) can mean the difference between success and failure. Yet the unfortunate fact is that most of us are (3) readers. Most of us develop poor reading (4) at an early age, and never get over them. The main deficiency (5) in the actual stuff of language itself—words. Taken individually, words have (6) meaning until they are strung together into phrases, sentences and paragraphs. (7) , however, the untrained reader does not read groups of words. He laboriously reads one word at a time, often regressing to (8) words or passages. Regression, the tendency to look back over (9) you have just read, is a common bad habit in reading. Another habit which (10) down the speed of reading is vocalization—sounding each word either orally or mentally as (11) reads.
To overcome these bad habits, some reading clinics use a device called an (12) , which moves a bar(or curtain) down the page at a predetermined speed. The bar is set at a slightly faster rate (13) the reader finds comfortable, in order to "stretch" him. The accelerator forces the reader to read fast, (14) word by word reading, regression and subvocalization practically impossible. At first (15) is sacrificed for speed. But when you learn to read ideas and concepts, you will not only read faster, (16) your comprehension will improve. Many people have found (17) reading skill drastically improved after some training. (18) Charlie Au, a business manager, for instance. His reading rate was a reasonably good 172words a minute (19) the training; now it is an excellent 1,378 words a minute. He is delighted that how he can (20) a lot more reading material in a short period of time.

A.good
B.curious
C.poor
D.urgent

题型:填空题

将压力表封口片(又称自由端)向左掰,指针运转()

A、前快后慢

B、前快后快

C、前慢后快

D、前慢后慢

题型:填空题

以下程序的输出结果是【 】。  #include<iostream.h>  void main( )  {   int a=0;   a+=(a=8);   cout< <a;  }

更多题库