下列方程中，不是一元二次方程的是（  ）

某报报道：“河南省西平县和平村农业社宣布小麦亩产7320斤”。这是发生在（    ）

从框里选择填入对话相应空白处的适当选项

A: Hello, this is Ann.Is that Helen ?
B: Yes, speaking.
A:Helen, The happy weekend is coming. ____ 
B: Yes, I’m not busy. I've already finished my homework.
A: ____ 
B: I’ve no idea. What about you ?
A: Let me see. Let's do something interesting and helpful. ____ 
B: Certainly. Where?
A: In the new museum.
B: Oh, I remember. I heard of it last week. ____ 
A: By bike. It's Saturday tomorrow. The traffic must be heavy, I think.
B: I agree. ____ 
A: At the gate of our school at nine in the morning.

A．经线____               ①连接南北两极的半圆

B．纬线____               ②地轴北段与地球表面的交点

C．地轴____               ③地球的自转轴

D．南极____               ④与地轴垂直并且在地表环绕一周的圆圈

E．北极____               ⑤地轴南段与地球表面的交点

—Thank you.