——I am going to take this summer holiday in Taiwan.
——Oh, really? Taiwan is ______ a beautiful island that ______ people in Guangdong go to visit it every year.
A:so; thousands
B:so; thousands of
C:such; many thousand
D:such; thousands of
平面直角坐标系中,直线l的参数方程是x=ty=3t(t为参数),以坐标原点为极点,x轴的正半轴为极轴,建立极坐标系,已知曲线C的极坐标方程为ρ2cos2θ+ρ2sin2θ﹣2ρsinθ﹣3=0.
(1)求直线l的极坐标方程;
(2)若直线l与曲线C相交于A、B两点,求|AB|.
下列式子能分解因式的是 ( )
水是我们日常生活必不可少的物质,下列有关水的说法正确的是( )