皮皮学，免费搜题
登录
搜题
【判断题】
新 产品包装最基本的功能是 保护商品。
A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
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
【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
【简答题】你所在的会计师事务所承接的某项企业管理诊断业务需要将某企业的指标与全国先进值、平均值和行业先进值、平均值进行比较分析。该企业是生产输电变压器和高低压开关柜的企业,年营业收入三年平均达 32,000 万元 / 年。该企业 2013 年度的净资产收益率为 5.2% 、总资产报酬率为 4.1% 、主营业务利润率为 9.8% 、总资产周转率为 1.3 次、应收账款周转率为 3.6 次、资产负债率为 78....
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
【简答题】触发器是能存储( )数码的一种数字电路。
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
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
【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
【简答题】你所在的会计师事务所承接的某项企业管理诊断业务需要将某企业的指标与全国先进值、平均值和行业先进值、平均值进行比较分析。该企业是生产输电变压器和高低压开关柜的企业,年营业收入三年平均达 32,000 万元 / 年。该企业 2013 年度的净资产收益率为 5.2% 、总资产报酬率为 4.1% 、主营业务利润率为 9.8% 、总资产周转率为 1.3 次、应收账款周转率为 3.6 次、资产负债率为 78....
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
【简答题】触发器是能存储( )数码的一种数字电路。
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