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搜题
【单选题】
肾病综合征患者应给予的饮食类型为A.
低蛋白、低脂肪饮食
B.
高蛋白、高脂肪饮食
C.
正常量优质蛋白、低脂肪饮食
D.
低胆固醇饮食
E.
低蛋白、高脂肪饮食
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举一反三
【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
【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
【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; } }
【简答题】设下图所示电路中硅稳压管D Z1 和D Z2 的稳定电压V Z1 和V Z2 分别为5V和8V, 正向导通电压均为0.7V,则电路的输出电压V O 为____;若将图中稳 压管D Z2 的阴阳极调换一下,则输出电压V O 变为____;
【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 ___________ 。
【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
【简答题】设下图所示电路中硅稳压管D Z1 和D Z2 的稳定电压V Z1 和V Z2 分别为5V和8V, 正向导通电压均为0.7V,则电路的输出电压V O 为____V;若将图中稳 压管D Z2 的阴阳极调换一下,则输出电压V O 变为____V;
【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
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