The advantage of the educational system in North America is that students learn to think for themselves.()

题目

The advantage of the educational system in North America is that students learn to think for themselves.()


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  • 第1题:

    classNav{11.publicenumDirection{NORTH,SOUTH,EAST,WEST}12.}13.publicclassSprite{14.//insertcodehere15.}Whichcode,insertedatline14,allowstheSpriteclasstocompile?()

    A.Directiond=NORTH;

    B.Nav.Directiond=NORTH;

    C.Directiond=Direction.NORTH;

    D.Nav.Directiond=Nav.Direction.NORTH;


    参考答案:D

  • 第2题:

    importjava.awt.*;publicclassXextendsFrame{publicstaticvoidmain(Stringargs){Xx=newX();x.pack();x.setVisible(true);}publicX(){setLayout(newBordrLayout());Panelp=newPanel();add(p,BorderLayout.NORTH);Buttonb=newButton(North”);p.add(b):Buttonb=newButton(South”);add(b1,BorderLayout.SOUTH):}}Whichtwostatementsaretrue?()

    A.Thebuttonslabeled“North”and“South”willhavethesamewidth.

    B.Thebuttonslabeled“North”and“South”willhavethesameheight.

    C.Theheightofthebuttonlabeled“North”canveryiftheFrameisresized.

    D.Theheightofthebuttonlabeled“South”canveryiftheFrameisresized.

    E.Thewidthofthebuttonlabeled“North”isconstanteveniftheFrameisresized.

    F.Thewidthofthebuttonlabeled“South”isconstanteveniftheFrameisresized.


    参考答案:B, E

  • 第3题:

    If a weather bulletin shows the center of a low pressure system to be 100 miles due east of you, what winds can you expect in the Southern Hemisphere? ______.

    A.South-southwesterly

    B.North-northwesterly

    C.South-southeasterly

    D.North-northeasterly


    正确答案:A
    假如你的气象报告显示有一低压区域的中心正好在你船位置以东100海里,在南半球你将预计是什么风?南到西南风。

  • 第4题:

    classParent{Stringone,two;

    classParent{

    Stringone,two;

    publicParent(Stringa,Stringb){

    one=a;

    two=b;}

    publicvoidprint(){System.out.println(one);}}

    publicclassChildextendsParent{

    publicChild(Stringa,Stringb){

    super(a,b);

    }

    publicvoidprint(){

    System.out.println(one+"to"+two);

    }

    publicstaticvoidmain(Stringarg[]){

    Parentp=newParent("south","north");

    Parentt=newChild("east","west");

    p.print();

    t.print();

    }

    }

    Whichofthefollowingiscorrect?()


    参考答案:E
    这个题目涉及继承时的多态性问题,在前面的问题中已经有讲述,要注意的是语句t.print();在运行时t实际指向的是一个Child对象,即java在运行时决定变量的实际类型,而在编译时t是一个Parent对象,因此,如果子类Child中有父类中没有的方法,例如printAll(),那么不能使用t.printAll()。

  • 第5题:

    Given:Which code, inserted at line 14, allows the Sprite class to compile?()

    A.Direction d = NORTH;

    B.Nav.Direction d = NORTH;

    C.Direction d = Direction.NORTH;

    D.Nav.Direction d = Nav.Direction.NORTH;


    参考答案:D

  • 第6题:

    危害程度的分级范围,下面选项哪些是正确的

    A.轻度危害(Ⅳ级):THI<35

    B.中度危害(Ⅲ级):THI≥35~<50

    C.高度危害(Ⅱ级):THI≥50~<65

    D.极度危害(工级):THI≥65


    轻度危害( Ⅳ 级):THI<35;中度危害( Ⅲ 级):THI≥35~<50;高度危害( Ⅱ 级):THI≥50~<65;极度危害(工级):THI≥65