执行如图所示的程序框图,则输出的k的值是( )
A:3
B:4
C:5
D:6
诗句填写。
设曲线C的参数方程为x=-1+22cosθy=-2+22sinθ(θ为参数),直线l的方程为x+y+1=0,则曲线C上到直线l距离为2的点的个数为( )
Not only the students but also the teacher ___ enjoying the film at 9 pm yesterday.
我国四大海域从北到南依次排列正确的是( )