【单选题】How do teachers prevent girls from actively participating in class?
A.
By praising boy students and criticizing girl students frequently.
B.
By assigning girls tasks culturally considered as suitable for them.
C.
By assigning girls difficult math problems they are unlikely to solve.
D.
By asking girl students to prepare classroom materials in advance.
【单选题】类模板template<class T>class x{…},其中,友元函数f对特定类型T(如int),使函数f(x<int>&=成为x<int>模板类的友元,则其说明为( )。
B.
friend void f(x<T>&=;)
D.
friend void C<T>::f(x<T>&=;)
【单选题】4G天线工作在OSI参考模型中的哪一层的:()
【判断题】访问控制列表只能基于OSI参考模型中的第三层地址对数据包进行检查。( )
【单选题】Class F{ } ; F f = new F(); 对于已经定义好的F类和f对象,有三种方法去获取类F的类类型,下面哪种是不正确的?
B.
Class c2= f.getClass ();
C.
Class.forName (“ com.text.F ”);
D.
Class c2=F .getClass ();
【简答题】贝塔的定义与哪一项联系更紧密? A.相关系数 B.均方差分析 C.非系统风险 D.资本资产定价模型