12．A． grade one，class fourB． class four，grade oneC． Grade One，Class FourD． Class Four，Grade One
12．
A． grade one，class four
B． class four，grade one
C． Grade One，Class Four
D． Class Four，Grade One
相关考题：
The school_________ of one class of twenty－four boys. A. composedB. in consistedC. is constitutedD. consisted
有如下程序: include using namespaee std; class ONE{ public: virtual void f 有如下程序：include ＜iostream＞using namespaee std；class ONE{public：virtual void f( ){cout＜＜"1"；}}；class TWO：public ONE{public：TWO( )1 cout＜＜"2"；}{；class THREE：public TWO{public：virtual void f( )}TWO::f( )；cout＜＜"3"；}}；int main( ){ONE aa，*P；TWO bb；THREE cc；P=cc；p-＞f( )；return 0；}程序的输出结果是______。
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现有： import java.util.*； class AddStuff2 { public static void main（String [] args） { TreeSett=new TreeSet（）； if （t.add（"one"）） if （t.add（"two"）） if （t.add （"three"）） add（"four"）； for （String s ： t） System.out.print （s）； } } 结果为：（） A、 oneB、 one three twoC、 one two threeD、 one two three fourE、 four one three twoF、编译失败
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单选题现有： import java.util.*； class AddStuff2 { public static void main（String [] args） { TreeSett=new TreeSet（）； if （t.add（"one"）） if （t.add（"two"）） if （t.add （"three"）） add（"four"）； for （String s ： t） System.out.print （s）； } } 结果为：（）A oneB one three twoC one two threeD one two three fourE four one three twoF编译失败