-----What _______ he _________like?  -----He’s tall and thin.

A．is; look

B．does; looks

C．does; look　　　

D．is; looks

若程序中定义了以下函数：　　double myadd(double a,double b)　　{ return (a+b);}　　并将其放在调用语句之后，则在调用之前应该对该函数进行说明，以下选项中错误的说明是（ ）。

A．double myadd(double a,b);

B．double myadd(double,double);

C．double myadd(double b,double a);

D．double myadd(double x,double y);