故障必须在运行线路上修理矿车时,施工前需争得调度员同意,并在施工地点前后各()米处设置安全警戒
A.60
B.45
C.30
D.15
参考答案:C
关税自主运动
以下程序的输出结果是【 】。 #include<iostream.h> class object { private: int va1; public: object( ); object(int i) ~object( );} ; object::Object( ) { va1=0; cout < < "Default constructor for object" < < end1;} object::object(int i) { va1=i cout < < "Constructor for object" < < va1 < < end1;} object::~object( ) { cout < < "Destructor for object" < < va1 < < end1;} class container { private: object one; object two; int data; public: container( ); container(int i,int j,int k); ~container( );} ; container::container( ) { data=0; cout < < "Default constructor for container" < < end1;} container::container(int i,int j,int k):two(i),one(j) { data=k; cout < < "Constructor for container" < < end1;} container::~container( ) { cout < < "Destructor for container" < < end1;} void main( ) { container anObj(5,6,10);}