骨质疏松症的常规生化检查项目包括（）。

A.血钙和血磷

B.PTH

C.血骨源性碱性磷酸酶

D.CTX或NTX

E.尿钙、尿磷

[听力原文]6-7

M: Thank goodness! We’ve finished doing the assignment before our afternoon class. Oh, I’ m so hungry!

W: So am I. It’s lunch time already. Let’s go to the school dining hall.

M: Oh, no, not me.

W: Why not The food is good and it’s not as expensive as the small restaurant next door.

M: It’ s not that. You see. I’ m not good at collecting my own food and drink. And every time I would drop something on myself or other people.

W: I can help you.

M: No, thanks. You see, Mom has made me a sandwich. All I need is a glass of water.

what is the boy going to do （）

A．To go to the school dining hall with the girl.

B．To eat the sandwich his mother has made for him.

C．To have lunch with the girl at the restaurant.

D．To drink a glass of water only.