下列虚类的声明中正确的是（）。 A: classvirtualB:publicA B: virtualclassB:publicA C: classB:publicAvirtual D: classB:virtualpublicA

下列虚基类的说明中,正确的是() A: classvirtualB:publicA B: classB:virtualpublicA C: virtualclassB:publicA D: classB:publicAvirtual

下列虚基类的声明中正确的是______。 A: classvirtualB:publicA B: classB:publicAvirtual C: classB:publicvirtualA D: virtualclassB:publicA

publicclassA1{publicA1(){System.out.println(hello);}}publicclassA2extendsA1{publicA2(){System.out.println(world);}}publicclassA3extendsA2{publicA3(){System.out.println(china);}}publicclassB{publicstaticvoidmain(String[]args){A1௅୔ৠቹቹ뗐敔敔ৠቹ�敘ৠቹﲘǛ瘓鞸ி

有一个类A，对于其构造函数的声明正确的是() A: voidA(intx){…} B: AA(intx){…} C: intA(intx){…} D: publicA(intx){…}

在过程中声明变量，下列属于局部变量声明的是 A: Dima，b，c B: Statica，b，c C: Privatea，b，c D: Publica，b，c

已知:class{public:inta;intb();intf();intf(int);intg();};classB{public:charf();intg();private:inta;intb();};classC:publicA,publicB{};设有:C*pc;则: A: pc->a存在二义性。 B: pc->b()存在二义性 C: pc->f(10)存在二义性。 D: D c->g()存在二义性。

假设有类A、B、C，其中类C继承自A和B，即classC:publicA,publicB{}。现类B、C中都有public成员x，那么，对于C的对象a，需要引用B中的x成员，其使用方法为____。 A: a.x B: a. C: x D: a.B::x E: a::B::x

for i in range(b.max_row): for j in range(b.max_column): print(b.cell(row=i,column=j).value)上面语句运行的结果是：__________。 A: 1 1 1 1 1 1 1 1 1 1 B: 1111111111 C: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D: 出现异常

【单选题】CDMA通信的基站,假定基站A的码片序列是+1 +1 +1 -1 -1 +1 -1 -1,基站发射bit为101时,实际发射的信号是 A. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 B. +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 +1 +1 +1 -1 -1 +1 -1 -1 C. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 D. –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1