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【单选题】
下面( )哪项 不属于机械的一类费用。 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
折旧费
B.
B、修理 及替换设备费
C.
C、动力燃料费
D.
D、安装拆卸费
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参考答案：
举一反三
【单选题】自动生物化学分析仪自动清洗吸样针原因
A.
提高精密度
B.
防止试剂干扰
C.
防止交叉污染
D.
提高反应速度
查看完整题目与答案
【多选题】服务性管理办法是一种软性的管理办法,主要包括( )
A.
信息传递
B.
严令禁止
C.
行为示范
D.
有效引导
查看完整题目与答案
【单选题】Which environment variable must be changed in auser’s profile so that upon login，the command prompt identifies the server？（）
A.
PMT
B.
PS1
C.
PRT
D.
PT1
查看完整题目与答案
【单选题】If average fixed costs equal $60 and average total costs equal $120 when output is 100, the total variable cost must be
A.
40
B.
60
C.
6000
D.
8000
查看完整题目与答案
【单选题】电路如图所示,稳压管的稳压值分别为 V Z1 =8V , V Z2 =6V ,两稳压管的最小稳定电流均为 I Zmin =5mA ,若 V I =10V 时,电路的输出电压 U O 等于( ) V 。
A.
6
B.
8
C.
10
D.
5
查看完整题目与答案
【单选题】You need to retrieve the username cookie from an HTTP request. If this cookie does NOT exist, then the c variable will be null. Which code snippet must be used to retrieve this cookie object?
A.
Cookie c = request.getCookie("username");
B.
Cookie c = null; for ( Iterator i = request.getCookies(); i.hasNext(); ) { Cookie o = (Cookie) i.next(); if ( o.getName().equals("username") ) { c = o; break; } }
C.
Cookie c = null; for ( Enumeration e = request.getCookies(); e.hasMoreElements(); ) { Cookie o = (Cookie) e.nextElement(); if ( o.getName().equals("username") ) { c = o; break; } }
D.
Cookie c = null; Cookie[] cookies = request.getCookies(); for ( int i = 0; i < cookies.length; i++ ) { if ( cookies[i].getName().equals("username") ) { c=cookies[i]; break; } }
查看完整题目与答案
【单选题】Rose, who grows geraniums to sell, is currently producing a level of output at which her marginal cost equals her average variable cost. What must be true about Rose's average total cost at this level...
A.
It is at a minimum.
B.
It is at a maximum.
C.
It is falling with increased output.
D.
It is equal to average variable cost.
查看完整题目与答案
【简答题】设硅稳压管 D z1 和 D z2 的稳定电压分别为 5V 和 10V ,已知稳压管的正向压降为 0.7V 。则图中电路的输出电压 Uo 为 ___________ 。
查看完整题目与答案
【单选题】A class design requires that a particular member variable must be accesible for direct access by any subclasses of this class, otherwise not by classes which are not members of the same package. What ...
A.
The variable should be marked public
B.
The variable should be marked private
C.
The variable should be marked protected
D.
The variable should have no special access modifier
查看完整题目与答案
【单选题】A variable must be defined ________.
A.
in every program
B.
and initialized at the same time
C.
once it has been used
D.
before it can be used
查看完整题目与答案
相关题目：
【单选题】自动生物化学分析仪自动清洗吸样针原因
A.
提高精密度
B.
防止试剂干扰
C.
防止交叉污染
D.
提高反应速度
查看完整题目与答案
【多选题】服务性管理办法是一种软性的管理办法,主要包括( )
A.
信息传递
B.
严令禁止
C.
行为示范
D.
有效引导
查看完整题目与答案
【单选题】Which environment variable must be changed in auser’s profile so that upon login，the command prompt identifies the server？（）
A.
PMT
B.
PS1
C.
PRT
D.
PT1
查看完整题目与答案
【单选题】If average fixed costs equal $60 and average total costs equal $120 when output is 100, the total variable cost must be
A.
40
B.
60
C.
6000
D.
8000
查看完整题目与答案
【单选题】电路如图所示,稳压管的稳压值分别为 V Z1 =8V , V Z2 =6V ,两稳压管的最小稳定电流均为 I Zmin =5mA ,若 V I =10V 时,电路的输出电压 U O 等于( ) V 。
A.
6
B.
8
C.
10
D.
5
查看完整题目与答案
【单选题】You need to retrieve the username cookie from an HTTP request. If this cookie does NOT exist, then the c variable will be null. Which code snippet must be used to retrieve this cookie object?
A.
Cookie c = request.getCookie("username");
B.
Cookie c = null; for ( Iterator i = request.getCookies(); i.hasNext(); ) { Cookie o = (Cookie) i.next(); if ( o.getName().equals("username") ) { c = o; break; } }
C.
Cookie c = null; for ( Enumeration e = request.getCookies(); e.hasMoreElements(); ) { Cookie o = (Cookie) e.nextElement(); if ( o.getName().equals("username") ) { c = o; break; } }
D.
Cookie c = null; Cookie[] cookies = request.getCookies(); for ( int i = 0; i < cookies.length; i++ ) { if ( cookies[i].getName().equals("username") ) { c=cookies[i]; break; } }
查看完整题目与答案
【单选题】Rose, who grows geraniums to sell, is currently producing a level of output at which her marginal cost equals her average variable cost. What must be true about Rose's average total cost at this level...
A.
It is at a minimum.
B.
It is at a maximum.
C.
It is falling with increased output.
D.
It is equal to average variable cost.
查看完整题目与答案
【简答题】设硅稳压管 D z1 和 D z2 的稳定电压分别为 5V 和 10V ,已知稳压管的正向压降为 0.7V 。则图中电路的输出电压 Uo 为 ___________ 。
查看完整题目与答案
【单选题】A class design requires that a particular member variable must be accesible for direct access by any subclasses of this class, otherwise not by classes which are not members of the same package. What ...
A.
The variable should be marked public
B.
The variable should be marked private
C.
The variable should be marked protected
D.
The variable should have no special access modifier
查看完整题目与答案
【单选题】A variable must be defined ________.
A.
in every program
B.
and initialized at the same time
C.
once it has been used
D.
before it can be used
查看完整题目与答案
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