Visitors travel up and down the tower in double-decker elevators that can hold up to _________people at the rate of seven meters per second.

下面函数定义中正确的是 。 A: double fun(double f1, double f2){ } B: double fun(double f1; double f2){ } C: double fun(double f1, double f2); { } D: double fun(double f1, f2){ }

以下函数定义中正确的是（）。 A: double fun(double x,double y){} B: double fun(double x;double Y){} C: double fun(double x,double Y);{} D: double fun(double X,Y){}

中国大学MOOC: public class Position{ double latitude; double longitude; public static double calDistance(double x1, double y1, double x2, double y2){ ...... } public static double calDirection(double x1, double y1, double x2, double y2){ ...... }}上述代码的设计是否合理？

下列函数声明语句正确的是？ A: double f(a,b); B: double f(double a, b); C: double f(a, double b); D: double f(double, double);

下列哪条语句正确？（ ） A: double snow[31]=new double[]; B: double snow[31]=new double[31]; C: double snow[]=new Double[31]; D: double[] snow=new double[31];

在C#中定义一个数组，正确的代码为 A: double A = new double[10]; B: double[] A = new double[10]; C: double A = new double(10); D: double A[10] = new double;

下列语句中错误的是( )。 A: double *p=new double(6); B: double *p=new double[6]; C: double *p=new double; D: double *p=new double[6](0);

These are motor vehicles. They have a motor that uses petrol. A: convertible B: double-decker bus C: mule D: pickup truck E: scoote F: tram G: wagon

以下选项中，（ ）是自动装箱。 A: double a=6.0; B: Double a=new Double("6.0"); C: Double a=6.0; D: double a=new Double(6.0);