氢气处理中出现的水垢如何清除？

Hello, I'm Tom. I'm a middle school student. It's nice to meet you here. First, let me tell you 46  about my family. There are five people in my 47 .They are my mother, my father, my sister, my brother and I.
My father is a worker. My mother is an English teacher. My sister is eighteen and my brother is sixteen. I'm fourteen. We  48  go to the same school. We all enjoy 49  football games.
My 50  is in West Street. There is a big tree and some small trees around my house. The big one is a pear tree and the small ones are apple  51 .  52 there 53 any pears or apples on them now.  54  a photo of my house. In the photo, you can see three cats in my house. They are all black and white. We  55 them very much.

小题1:	A．anything B．something C．thing D．anyone

小题2:	A．school B．house C．room D．family

小题3:	A．two B．five C．three D．six

小题4:	A．seeing B．looking at C．watching D．looking

小题5:	A．bed B．school C．room D．home

小题6:	A．trees B．rivers C．houses D．schools

小题7:	A．But B．And C．So D．Or

小题8:	A．isn't B．is C．are D．aren't

小题9:	A．He's B．Here's C．It's D．There are

小题10:

A．are liking B．likes C．like D．is liking