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【单选题】
04-126电梯开关门过程的噪声,优等品的标准是小于( )dB。A.
80
B.
70
C.
55
D.
50
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【简答题】运行下面代码,弹出的对话框中输出 _________ 。 $(document).ready(function(){ alert($("label + input").val()); }); Number:
【简答题】运行下面代码,弹出的对话框中输出___________(忽略空格换行等标记)。 $(document).ready(function(){ alert($("div > p").text()); }); one two three
【单选题】RAID系统有不同的级别，如果一个单位的管理系统既有大量数据需要存取，又对数据安全性要求严格，那么此时应采用（ ）。
A.
RAID 0
B.
RAID 1
C.
RAID 5
D.
RAID 0+1
【单选题】Jim Hatfield decided to become a do-it-yourself when ______.
A.
his car repairs cost too much
B.
the car repair class was not helpful
C.
he could not possibly do two jobs
D.
he had to raise the children all by himself
【简答题】数据库安全技术面临着哪些安全需求?解决的方法有哪些?
【单选题】Why did Jim decide to become a do-it-yourselfer?
A.
His car repairs cost too much.
B.
The car repair class was not helpful.
C.
He could not possibly do two jobs.
D.
He had to raise the children all by himself.
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