实验1：I．将盛有足量锌粒的燃烧匙伸入瓶中，塞紧瓶塞；

II．打开K，从长颈漏斗向瓶内加入稀盐酸，至浸没锌粒；

III．当瓶中产生大量气泡时，关闭K；

实验2：I．将盛有白磷的燃烧匙伸入瓶中，塞紧瓶塞；

II．打开K，从长颈漏斗向瓶内加入约80℃的热水，至浸没白磷；

III．从a口向瓶中鼓入空气，使瓶中液面低于燃烧匙底部，关闭K；

MY Travel Experience in China

    During the summer holidays I visited a variety of regions in China.

My first stop was Beijing and of course the Great Wall. Without question it lived up to my ____ (expect).

    After a long journey, I reached Yunnan. With____(it) minority villages and impressive landscapes, Yunnan had a lot to offer. One of my ____ (enjoy) moments in Yunnan was during my visit to The Tiger Leaping Gorge. The climb over the gorge was at times exhausting ____ always breathtaking. The views couldn't ____ (imagine) in their beauty and they ____ (leave) me with many great memories.

    After taking a boat from the mainland I arrived at ____ island province of Hainan. There I visited Baihua Waterfall. Floating on a pool of water at the base and looking up at the waterfall with a background of blue sky was one of the most ____ (relax) experiences of my life.

    Throughout China there are many ancient buildings and in particular ancient towns. Lijiang and Dali both have glorious ____ (example) of this. It was remarkable to step back in time and get an idea of____ China might have looked like all those years ago. I thought the buildings were beautiful and full of history.

    I had a wonderful time! China is both fascinating and beautiful!

       欣赏是一种学习，一种感悟，一种特别人收获。欣赏一个浅浅的微笑，会让你忘却生活的无奈与愁苦；欣赏一处小小的风景，会让你体会心灵的静谧与安宁；____，____。