你可能感兴趣的试题
88 ****88 ****8****8 8****8
G90G27X10Y10; G90G28 X10 Y10; G91G28 X10 Y10; G90G53G00 X0 Y0; G90G54G00 X0 Y0;
G54G90G28 X0 Y0; G91G28 X0 Y0; G54G90G28 X10.Y10.; G90G28 X0 Y0; G54G91G28 X10.Y10.;
A.x+xa.y;
return os;
;
int main()
CSum y(3,5);
cout<<setfill(’*’)<<8;
cout<<y;
return 0;
执行上面程序的输出是( )。 88 ****88 ****8****8 8****8
88 ****88 ****8****8 8****8
G28G91 Z0 G28 X0 Y0 Z0 G28G90 Z0 G90G28 X0 Y0
os<<setw(5)<<xa.x+xa.y;
&nbs
(-5,y1), (3,y2)均在抛物线y=ax2+bx+c(a≠0)上,点 (x0,y0)是抛物线的顶点,若y1>y2>y0,则x0的取值范围是( ) A.x0>-5 B.x0>-1 C.-5-2
88 ****88 ****8****8 8****8
88 ****88 ****8****8 8****8
N004 G90 G00 X20 N006 G01 G02 X0 Y0 I-20 J0 N008 X-20 Y0 I0 J-20 F100 N010 X0 Y-20 I20 J0
88 ****88 ****8****8 8****8
A(x-x0)+B(y-y0)=0 A(x-x0)-B(y-y0)=0 B(x-x0)+A(y-y0)=0 B(x-x0)-A(y-y0)=0
88 ****88 ****8****8 8****8