在下面程序中，A、B、C、D四句编译时不会出错的是( )。 #include ＜iostream＞ using namespace std; class Base{ public:Base();Base(int e):count(C) {}virtual void print() const = 0; private:int count; }; class Derived :public Base{ public:Derived():Base(0) {}Derived(int C) :Base(C) {}void printt() const{cout＜＜ "Derived"＜＜endl:} }; void main( ) {Derived d(10);Base *pb;pb = &d; //ABase &cb= d;Derived dd = *pb;//BDerived &cd = cb;//CBase bb = d; //D

A．a

B．B

C．C

D．D

一侧内侧纵束下行纤维受损，双眼向同侧注视时，同侧眼球不能外展，对侧眼球可以内收的是（）

A.前核间性眼肌麻痹

B.后核间性眼肌麻痹

C.一个半综合征

D.周围性眼肌麻痹

E.中枢性眼肌麻痹