利用继承能够实现 ______。这种实现缩短了程序的开发时间,促使开发人员复用已经测

题型:填空题

问题:

利用继承能够实现 ______。这种实现缩短了程序的开发时间,促使开发人员复用已经测试和调试好的高质量软件。

考点:计算机等级考试C++二级C++笔试
题型:填空题

阅读理解。

     Mr White is a teacher.  He lives in the school.  His house is near. the school playground  (操场).

 The children often play football on the playground. Sometimes (有时)  they break (打破, 打碎)  

Mr White's windows  (窗户).

     One afternoon, Mr White is at home.  He reads a book.  Soon he closes his eyes and goes to sleep. 

At this time, a little boy knocks at the door. Mr White opens the door and asks, "Did you break my

window again?"

      "Oh, no" answers the boy, "your window is open this time.  Our football is in your room. Can I get

it back, please?"

根据短文内容判断正(T)误(F)。

( ) 1. Mr White lives near the school playground.

( ) 2. The children never break Mr White's windows.

( ) 3. The little boy breaks the window again.

( ) 4. The football is in Mr White's room.

( ) 5. The little boy wants to get his football back.

题型:填空题

体位性低血压诊断标准错误的是()。

A.由卧位向坐位或站立位转移

B.出现面色苍白、恶心、呕吐、胸闷、心慌不适、冷汗等症状

C.甚至意识丧失或晕厥

D.血压下降20~30mmHg

E.血压下降1.33~2.67kPa

题型:填空题

下图是某建筑的平面图,该平面图是用()绘制的工程图。

A、正投影法

B、斜投影法

C、中心投影法

题型:填空题

排列后牙时常规采用的是下列哪项方法?()

A.上后牙数不变,下后牙数也不变

B.上后牙数不变,下后牙多排一个前磨牙

C.上后牙数不变,下后牙少排一个前磨牙

D.上后牙多排一个前磨牙,下后牙数不变

E.上后牙少排一个前磨牙,下后牙多排一个前磨牙

题型:填空题

某三相异步电动机,其起动能力为1.3,当电源电压下降30%时(即电源电压只有额定电压的70%)时,电动机轴上的负载为额定负载的一半。问电动机能否起动起来?(通过计算说明)

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