数据库DB、数据库系统DBS、数据库管理系统DBMS之间的关系是______。A.D

题型:单项选择题

问题:

数据库DB、数据库系统DBS、数据库管理系统DBMS之间的关系是______。

A.DB 包含 DBS 和 DBMS

B.DBMS 包含 DB 和 DBS

C.DBS 包含 DB 和 DBMS

D.没有任何关系

考点:计算机等级考试VISUALFOXPRO计算机二级(VF)37
题型:单项选择题

动画中用PH试纸检测酸碱性,表现的是()。

A:物理性质

B:化学性质

C:其它性质

题型:单项选择题



Today I’d like to talk about how to become a (1) . Usually you have to start at the beginning. That is, you have to begin (2) of some sort on a local newspaper, a (3) , maybe on a small magazine -- work (4) . Now there aren’t that many organizations which have large numbers of foreign correspondents so you also have to (5) with that aim (6) . Another way of doing it is to work abroad, and work as (7) . That’s somebody who sells stories, and gets paid (8) , to newspapers and magazines and so on. And hoping to (9) that way, and eventually to be offered a (10) .
I don’t really know (11) are needed, but obviously a degree in modern languages or (12) would be very useful. But, a degree in itself probably wouldn’t (13) . It wouldn’t be enough to get you job. It wouldn’t (14) to make an editor decide to (15) . So it’s difficult to define the (16) . You’re going to need (17) and the ability to assimilate information (18) and then produce stories which (19) of the newspaper or radio or television station you (20) .

题型:单项选择题

对于日射病的描述不正确的是()。

A、因强烈的阳光或热辐射线直接作用于头部,引起颅内温度升高

B、出现脑及脑膜水肿、充血

C、剧烈的头痛、头晕、呕吐

D、意识清楚

题型:单项选择题

53岁妇女,绝经2年, * * 分泌物增多伴腰痛2个月,偶有少量 * * 出血。妇科检查:宫颈结节状增大,直径5cm,质硬,触血(+),左侧主韧带条索状增粗>1/2,右侧主韧带内1/2增粗,均弹性下降

入院后行B超检查发现左侧肾盂积水,其临床分期为()

A.Ⅱa期

B.Ⅱb期

C.Ⅲa期

D.Ⅲb期

E.Ⅳa期

题型:单项选择题

某公司由于目前的信用政策过程过严.不利于扩大销售,同时收账费用过高,该公司准备修正现行的信用政策。现有甲、乙两个备选方案,有关数据见下表。

项目现行收账政策甲方案乙方案
年赊销额(万元/年)480052005400
信用条件N/60N/902/60,N/180
收账费用(万元/年)804020
所有账户的平均收账率60天180天预计有50%的客户会享受现金折扣
所有账户的坏账损失率2%2.5%3%
变动成本率80%80%80%
应收账款投资的最低报酬率15%15%15%

要求:在不考虑所得税的影响时,应否改变现行的信用政策如果要改变,应选择哪个方案

更多题库