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【多选题】
矢量数据压缩的基本原则包括
A.
取得尽可能大的压缩比
B.
最好地逼近原集合
C.
保持空间关系正确
D.
尽可能保持数据精度
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【判断题】唯心主义认为世界统一于意识。
A.
正确
B.
错误
【单选题】Newspapers and scientific journals are both______.
A.
suffering from revenue shrink
B.
operating under systematic reviews
C.
facing huge pressures to change
D.
moving in the direction favored by Shirky
【单选题】Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?
A.
Pressure-reducing valve
B.
Unloading valve
C.
Counterbalance valve
D.
Pressure-relief valve
【单选题】已知向量 a =(3,4), b =(2,-1) ,如果向量 a +x b 与 b 垂直,则x=(  )
A.
23 3
B.
3 23
C.
2
D.
- 2 5
【单选题】The construction portfolio may be included as part of the ship ().
A.
general plans
B.
operating manual
C.
builders documentation
D.
CCS file
【单选题】In the Oil Record Book, a comprehensive list of operational items are grouped into operational sectionsEach section is codified by a/an _____.
A.
number
B.
abbreviation
C.
letter
D.
All of the above
【单选题】唯物主义和唯心主义在世界统一性问题上的根本分歧是( )
A.
认为世界统一于运动还是统一于静止
B.
认为世界统一于主体还是统一于客体
C.
认为世界统一于物质还是统一于精神
D.
肯定世界的统一性还是否认世界的统一性
【单选题】阅读下文,回答题 The Chinese have used a method called acupuncture(针灸) to perform. operations for about 4,000 years without putting the patient to sleep. This involves placing flexible needles into certain pa...
A.
a medical operation
B.
a medical needle
C.
a medical technique
D.
a medical machine
【单选题】已知向量 a =(3,4), b =(2,-1),如果向量 a +x b 与 b 垂直,则x的值为 [     ]
A.
B.
C.
2
【单选题】已知向量 a =(2,1), b =(x,-2)且 a + b 与2 a - b 平行,则x等于(  )
A.
-6
B.
6
C.
-4
D.
4
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