What kind of room does he want to book at first（） A: A single. B: A double. C: A suite. D: A double with a bathroom.

By 2030 the world ’ s demand for energy is projected to more than double.

C语言基本数据类型包含:int,char,float,double.

The<br/>classical economists believed that if the quantity of money doubled, A: output<br/>would double. B: prices<br/>would fall. C: prices<br/>would double. D: prices<br/>would remain constant.

在句子It is likely that the number of homes in TownA will double.中，It is likely that =it is predicted/estimated/projected/expected that…

mini-talk 2 A: It will grow 70%. B: It tends to be relatively stable. C: It is expected to decline. D: It could double.

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);