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【简答题】
和文件系统相比，数据库系统的数据冗余度 【6】 ，数据共享性 【7】 。
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举一反三
【简答题】A．He was out. B．He was forced to lie down on the floor. C．He was talking to his assistant in his office. D．He was telephoning the police.
【单选题】No brave men lie down on the _____ of history to wait for the train of the future to run over them. [ ]
A.
periods
B.
tracks
C.
stages
D.
positions
【简答题】基本操作练习,按要求完成在3月4日前提交作业。 要求:1、去除图片右上角广告语;2、去除螺丝;3、不影响主体人物的细节(后期还要继续用)。4、保存psd格式文档备用,原图+JPG修图摆在一起,截屏提交作业。
【单选题】You must use this cushion as a ______ when you lie down on the sofa.
A.
pillar
B.
piston
C.
pillow
D.
plaster
【简答题】we use water to____(做晚饭 )
【单选题】Everybody needs water. Everything 16 water，too. We use water 17 the bowls, the clothes, and 18 .We use water to plant trees, flowers and crops. 19 does all water come from? It 20 from clouds...
A.
on
B.
into
C.
going D to go 小题9: A．into B．on C．it D．its 小题10: A．here B．there C．to D．down
【简答题】We are safe neither at home nor in the business office.We use water in both places.Our local water supply added chemicals into the water to kill harmful bacteria.But the chemicals can cause harm to pe...
【简答题】We use water to ____(洗衣服 )
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