参考答案和解析
正确答案:C
解析:connect 联结;contact 联系;concentrate 集中;confine 限制。根据句子的意思,应该是光线的集中,而不是其它,所以选择C.
更多“The light from a laser () in a narrow beam. ”相关问题
  • 第1题:

    Einstein's Theory of Relativity was so profound that only a few scientists could understand it.

    A: deep
    B: superior
    C: wide
    D: narrow

    答案:A
    解析:
    句意:爱因斯坦的相对论是如此的深奥,以至于只有少数科学家能够理解。pro-found意为“深刻的,深奥的”,与deep(深远的,深奥)意思相近。superior意为“较高的,较好的”;wide意为“宽的”;narrow意为“窄的”。

  • 第2题:

    Frankly speaking,the Expo site is superb;however,some of the visitors are far from cultivated.

    A: narrow-minded
    B: well-dressed
    C: diligent
    D: good-mannered

    答案:D
    解析:
    本句意思是:坦白地说世博会的位置是很棒的,然而有些参观者则远不能称之为文明。句中cultivated意为“有教养的”,如:These cultivated individuals have been imbued with a sense of social purpose.这些有教养的人满怀着社会责任感。narrow-minded意为 “气量小的”。 well-dressed意为“衣着入时的”。diligent意为“勤奋的,用功的”,如:He is the more diligent of the two boys.他是这两个男孩中较用功的一个。good-mannered意为“有礼貌的”。只有选项D同句中画线词语含义接近。

  • 第3题:

    用所给词的适当形式填空 45. He did not however say that the president lied, but rather that his response was “____________ narrow” and evasive. (suspicious)


    мой

  • 第4题:

    阅读下列说明和C++代码,回答问题,将解答填入答题纸的对应栏内。
    【说明】
    某灯具厂商欲生产一个灯具遥控器,该遥控器具有7个可编程的插槽,每个插槽都有开关按钮,对应着一个不同的灯。利用该遥控器能够统一控制房间中该厂商所有品牌灯具的开关,现采用Command(命令)模式实现该遥控器的软件部分。Command模式的类图如下图所示。

    【C++代码】

    class Light {public: Light(stringname) { /* 代码省略 */ } void on() {/* 代码省略 */ } // 开灯 void off() {/* 代码省略 */ } // 关灯};class Command {public: (1) ;};class LightOnCommand:public Command { // 开灯命令private: Light* light;public: LightOnCommand(Light* light) { this->light=light; } voidexecute() { (2) ; }};class LightOffCommand:public Command { // 关灯命令private: Light *light;public: LightOffCommand(Light* light) { this->light=light; } voidexecute() { (3) ; }};class RemoteControl{ // 遥控器private: Command*onCommands[7]; Command*offCommands[7];public: RemoteControl() { /* 代码省略*/ } voidsetCommand(int slot, Command* onCommand, Command* offCommand) { (4) =onCommand; (5) =offCommand; } voidonButtonWasPushed(int slot) { (6) ; } voidoffButtonWasPushed(int slot) { (7) ; }};int main() { RemoteControl* remoteControl=new RemoteControl(); Light*livingRoomLight=new Light("Living Room"); Light*kitchenLight=new Light("kitchen"); LightOnCommand*livingRoomLightOn=newLightOnCommand(livingRoomLight); LightOffCommand* livingRoomLightOff=newLightOffCommand(livingRoomLight); LightOnCommand*kitchenLightOn=new LightOnCommand(kitchenLight); LightOffCommand* kitchenLightOff=new LightOffCommand(kitchenLight); remoteControl->setCommand(0, livingRoomLightOn, livingRoomLightOff); remoteControl->setCommand(1,kitchenLightOn, kitchenLightOff); remoteControl->onButtonWasPushed(0); remoteControl->offButtonWasPushed(0); remoteControl->onButtonWasPushed(1); remoteControl->offButtonWasPushed(1); /* 其余代码省略 */ return 0;}


    答案:
    解析:
    (1)virtual void execute()=0
    (2)light->on()
    (3)light->off()
    (4)onCommands[slot]
    (5)offCommands[slot]
    (6)onCommands[slot]->execute()
    (7)offCommands[slot]->execute()

  • 第5题:

    Einstein's Theory of Relativity was so pofound that only a few scientists could understand it.

    A:deep
    B:superior
    C:wide
    D:narrow

    答案:A
    解析:
    本句意思:爱因斯坦的相对论是如此的深奥,以至于只有少数科学家能够理解它。profound意为“深刻的,深奥的”,与deep(难懂的,深奥的)意思相近。superior较高的,较好的;wide宽的;narrow窄的。

  • 第6题:

    缩略法构成的单词“laser”的全拼是()。

    A.light amplify of simulation essision of radiation

    B.light radiation

    C.light amplification by stimulated emission of radiation

    D.light amplification


    正确