2022计算机操作员高级每日一练07-31

来源:总题库 时间:2022-07-31 07:28:09

1、单选框中一定有()个选项被选中

A. 4
B. 2
C. 3
D. 1

2、数据库管理系统是对数据库进行统一的管理和控制,以保证数据库的()和完整性。

3、中继器具备检查错误和纠正错误的能力。

4、考核要求
英文基本录入:在10min之内录入以下内容。
Daily, moderate drinking could almost halve the risk of developing Alzheimer’s disease or other types of dementia, according to new research.
The finding adds to a growing body of evidence for the health benefits of moderate drinking which is already known to protect against heart disease and stroke.
The adverse effect of excess alcohol is beyond question. Besides destroying the liver, several studies have shown that exessive drinking can be toxic to the brain. Alcoholics can end up with a shrunken brain, which is linked to dementia. There is even a medical condition called alcoholic dementia.
Scientists at Erasmus University in Rotterdam, the Netherlands, conducted a six-year study of 5,395 people aged 55 and over who did not have signs of dementia. They were asked whether they ever drank alcohol. Those who said yes were quizzed on how often they drank and details on their consumption of specific drinks such as wine, beer, spirits and fortified wine such as sherry and port.
The men mostly drank beer and liquor, while women preferred wine and fortified wine. The researchers also checked whether participants’ drinking habits had changed over the preceding five years or whether they had engaged in binge drinking-more than six drinks in one day.
Everyone was categorized according to how much they drank. Four or more glasses of alcohol perday were considered heavy drinking.
By the end of the study in 1999, 197 of the participants had developed Alzheimer’s or another form of dementia. Those who fared best were people who drank between one and three drinks a day. They had a 42 percent lower risk of developing dementia than the nondrinkers.
Those who weren’t daily drinkers but had more than one drink per week had a 25 percent lower risk and those who drank less than a glass a week were 18 percent less likely than nondrinkers to develop dementia. Heavy drinkers, who numbered 165-mostly men-were 1 1/2 times more likely to get vascular dementia and slightly more likely than nondrinkers of ending up with Alzheimer’s.
Researchers suggested the blood-thinning and cholesterol-lowering properties of ethanol in alcohol may ward off dementia, which is often caused by a blood vessel problem.
Another possibility, the study speculated, is that low levels of alcohol could stimulate the release acetylcholine, a brain chemical believed to facilitate learning and memory.

5、一般PowerPoint 2003不会检查字形的最大数目。

6、“播客”是“Web Log(网络日志)”的缩写。

7、网页通常是HTML格式的文件,它可以通过Internet用浏览器来阅读。

8、在Access 2003中,向表中输入记录时按______键可以转至下一个字段。

A. Shift
B. Ctrl
C. Tab
D. Enter

9、IP地址是由一组以小数点分隔的______个0~255之间的数字组成的。

A. 1
B. 2
C. 3
D. 4

10、下列关于网页的说法正确的是______。

A. 是HTML格式的文件
B. 文件扩展名为.html或.htm
C. 可通过Internet用浏览器来阅读
D. 是EXE格式的文件