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【单选题】
下列关于计量检定特点的说法错误的是( )。
A.
检定的目的是判定计量器具是否向国务院计量行政部门备案
B.
检定的主体是计量检定人员
C.
检定的性质是具有法制性的
D.
检定的结果必须做出是否合格的结论，并出具加盖印章的证书
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举一反三
【判断题】( )氟里昂是以前常用的冷冻剂,它一般不会污染环境。
A.
正确
B.
错误
查看完整题目与答案
【单选题】During compressors running the accumulated moisture in the separators must be _____.
A.
drained off
B.
collected
C.
sent to the crankcases
D.
separated with oil
查看完整题目与答案
【多选题】在“药品生产验证指南”中,将验证分为()
A.
前验证
B.
回顾性验证
C.
再验证
D.
同步验证
E.
产品验证
查看完整题目与答案
【单选题】By far the greatest item of maintenance of the reciprocating air compressors concerns _____.
A.
the lubrication
B.
the cooling
C.
the moisture separation
D.
the valves
查看完整题目与答案
【简答题】During operation, gas enters a centrifugal compressor at the suction inlet and isaccelerated radially by moving ________ . Centrifugal compressors haveone moving element, the _____ and ______.
查看完整题目与答案
【简答题】Compressors differ from pumps in that pumps move ______ and compressors move ______ .
查看完整题目与答案
【单选题】Which of the following statements is true concerning the overall efficiency of air compressors?
A.
High pressure compressors are more efficient than low pressure compressors
B.
Mechanical efficiency divided by compressor efficiency will equal the overall efficiency of the compressor unit
C.
Two stage compressors are generally more efficient than single stage compressors.
D.
The volumetric efficiency is decreased in multistage compressors
查看完整题目与答案
【单选题】Air compressors are equipped with unloading systems for the purpose of _____.
A.
removing all but the frictional load during starting
B.
relieving intercoolers of high temperature buildups
C.
providing high starting torque in the drive motor
D.
seating valve plates during compressor shutdown
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【单选题】下列四个选项是对皮亚杰个体思维发展理论的叙述和评价，其中不正确的一项是()．
A.
阶段出现的先后顺序固定不变，每一阶段都有其独特的图式或认知结构
B.
图式或认知结构的发展是一个连续建构的过程
C.
皮亚杰将思维发展的过程分为四个阶段的顺序是：感知一动作阶段、前运算阶段、形式运算阶段、具体运算阶段
D.
现在有些心理学家对皮亚杰的思维发展理论的某些观点存在质疑
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【单选题】某企业2013年度的利润总额为1 000万元,其中包括本年收到的国库券利息收入20万元;假定业务招待费税法规定的扣除标准为400万元,企业全年实际发生的业务招待费为350万元,企业所得税税率为25%。该企业2013年所得税费用为( )万元。
A.
250
B.
232.5
C.
245
D.
257.5
查看完整题目与答案
相关题目：
【判断题】( )氟里昂是以前常用的冷冻剂,它一般不会污染环境。
A.
正确
B.
错误
查看完整题目与答案
【单选题】During compressors running the accumulated moisture in the separators must be _____.
A.
drained off
B.
collected
C.
sent to the crankcases
D.
separated with oil
查看完整题目与答案
【多选题】在“药品生产验证指南”中,将验证分为()
A.
前验证
B.
回顾性验证
C.
再验证
D.
同步验证
E.
产品验证
查看完整题目与答案
【单选题】By far the greatest item of maintenance of the reciprocating air compressors concerns _____.
A.
the lubrication
B.
the cooling
C.
the moisture separation
D.
the valves
查看完整题目与答案
【简答题】During operation, gas enters a centrifugal compressor at the suction inlet and isaccelerated radially by moving ________ . Centrifugal compressors haveone moving element, the _____ and ______.
查看完整题目与答案
【简答题】Compressors differ from pumps in that pumps move ______ and compressors move ______ .
查看完整题目与答案
【单选题】Which of the following statements is true concerning the overall efficiency of air compressors?
A.
High pressure compressors are more efficient than low pressure compressors
B.
Mechanical efficiency divided by compressor efficiency will equal the overall efficiency of the compressor unit
C.
Two stage compressors are generally more efficient than single stage compressors.
D.
The volumetric efficiency is decreased in multistage compressors
查看完整题目与答案
【单选题】Air compressors are equipped with unloading systems for the purpose of _____.
A.
removing all but the frictional load during starting
B.
relieving intercoolers of high temperature buildups
C.
providing high starting torque in the drive motor
D.
seating valve plates during compressor shutdown
查看完整题目与答案
【单选题】下列四个选项是对皮亚杰个体思维发展理论的叙述和评价，其中不正确的一项是()．
A.
阶段出现的先后顺序固定不变，每一阶段都有其独特的图式或认知结构
B.
图式或认知结构的发展是一个连续建构的过程
C.
皮亚杰将思维发展的过程分为四个阶段的顺序是：感知一动作阶段、前运算阶段、形式运算阶段、具体运算阶段
D.
现在有些心理学家对皮亚杰的思维发展理论的某些观点存在质疑
查看完整题目与答案
【单选题】某企业2013年度的利润总额为1 000万元,其中包括本年收到的国库券利息收入20万元;假定业务招待费税法规定的扣除标准为400万元,企业全年实际发生的业务招待费为350万元,企业所得税税率为25%。该企业2013年所得税费用为( )万元。
A.
250
B.
232.5
C.
245
D.
257.5
查看完整题目与答案