We will have a party. Would you like to _________ us?
A:join
B:join in
C:take part
D:take part in
下列加线词语的意义和用法相同的一项是( )
(Ⅰ)写出C1的参数方程和C2的直角坐标方程;
(Ⅱ)设点P在C1上,点Q在C2上,求|PQ|的最大值.