患者男性，45岁，用力排便时起病，剧烈头痛，呕吐。短暂意识不清，就诊时颈部强直，右侧下肢疼痛。

头CT示脑池内高密度区。为确定诊断，该患者进一步检查是（）

A.磁共振

B.头CT平扫

C.X线检查

D.眼底检查

E.腰穿脑脊液检查

有如下程序: #include＜iostream＞ using namespace std; class Base{ public:virtual void func1(){cout＜＜"Base 1";}void rune2(){cout＜＜"Base 2";} }; class Derived:public Base{ public:void func1(){cout＜＜"Derived 1";}void func2(){cout＜＜"Derived 2";} }; int main(){Base *p=new Derived;P-＞func1();P-＞func2();return 0: } 运行此程序,屏幕上将显示输出______。

A．Derived 1 Base 2

B．Base 1 Base 2

C．Derived 1 Derived 2

D．Base 1 Derived 2