以下选项中正确的定义语句是（ ）。A.double，a，b；B.double a=b=7；C.double a；b；D.double a=7，b=7；
以下选项中正确的定义语句是（ ）。A.double a；b；B.double a=b=7；C.double a=7，b=7；D.double，a，b；
以下选项中正确的定义语句是（)A．double, a, b;B．double a=b=7;C．double a; b;D．double a=7, b=7;
1、以下选项中正确的定义语句是A．double a;b;B．double a = b=7 ;C．double a = 7,b=7;D．double , a,b;
以下选项中正确的定义语句是__________A．double a=7,b=7;B．double a;b;C．double,a,b;D．double a=b=7;
以下选项中正确的定义语句是（）A．double, a, b;B．double a=b=7;C．double a; b;D．double a=7, b=7;
以下选项中正确的定义语句是（）。A．double a; b;B．double a=b=7;C．double a=7, b=7;D．double, a, b;
4、以下选项中正确的定义语句是A．double a;b;B．double a = b=7 ;C．double a = 7,b=7;D．double , a,b;
13、以下选项中正确的定义语句是（)A．double, a, b;B．double a=b=7;C．double a; b;D．double a=7, b=7;