A: Morning, Tom. You don't look well. ____?

B: Well, I have got a cold. But it's not serious. Hey, Jack, did you see the movie on CCTV 6 last night?

A: No, I didn't. ____?

B: Harry Potter Ⅲ. It was so exciting. So, what were you doing at that time?

A: ____. I'm not good at English, you know.

B: But English is not very hard to learn. ____.

A: Thank you for your advice. ____?

B: It's nearly 7:50. Hurry up, or we'll be late fir school.

①点P到坐标原点的距离为 $\sqrt{13}$ ；

②OP的中点坐标为（ $\frac{1}{2}，1，\frac{3}{2}$ ）；

③点P关于x轴对称的点的坐标为（﹣1，﹣2，﹣3）；

④点P关于坐标原点对称的点的坐标为（1，2，﹣3）；

⑤点P关于坐标平面xOy对称的点的坐标为（1，2，﹣3）．

其中正确的个数是（   ）