产品生产环节中，附加值最低的环节是（　）

下列关于生长素的说法，正确的是（　　）

阅读对话，根据对话选择正确的答案。

Zoom: Welcome to our school.

Monkey: Thank you.

Zoom: That is our playground. This is our new gym. We can play ping-pong in it.

Monkey: Is this your computer room?

Zoom: Yes. It's on the second floor.

Monkey: Do you have a music room?

Zoom: Yes, we do. It's on the first floor. This way, please.

沿海地区昼夜之间的温差与同纬度内陆地区昼夜之间的温差不同，图列出的是2010年6月某日同纬度的沿海某城市和内陆某城市的气温情况：

请判断甲是____ (填“沿海”或“内陆”)城市，你的依据是____ 。