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问题 选择题

下列变化属于化学变化的是（　　）

A．夏天将西瓜榨成西瓜汁

B．天然气燃烧

C．分离液态空气得到液氧

D．将记录有机密信息的纸张粉碎

答案

A、夏天将西瓜榨成西瓜汁的过程中没有新物质生成，属于物理变化．

B、天然气燃烧生成二氧化碳和水，属于化学变化．

C、分离液态空气得到液氧的过程中没有新物质生成，属于物理变化．

D、将记录有机密信息的纸张粉碎的过程中没有新物质生成，属于物理变化．

故选B．

单项选择题

取样测定夯实后土的干土质量密度，不合格的干土质量密度的最低值与设计值的差，不应大于（）g/cm3。

A、0.08

B、0.09

C、0.10

D、0.12
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单项选择题

There are many kinds of friends. Some are always (1) you, but don’t understand you. Some say only a few words to you, but understand you. Many people will step in your life, but only (2) friends leave footprints.
I shall always recall the autumn and the girl with the (3) . She will always bring back the friendship between us. I know she will always be my best friend.
It was the golden season. I could see the yellow leaves (4) with the cool (5) . In such a season, I liked walking alone on the roads covered with leaves, (6) to the sound of them.
Autumn is a (7) season and life is uninteresting. The free days always get me (8) . But one day, the sound of a violin (9) into my ears like a stream flowing in the mountains. I was so surprised that I jumped to see what it was. A young girl, standing in the wind, was (10) in playing her violin.
I had (11) seen her before. The music was so nice that I listened quietly. Lost in the music, I didn’t know that I had been (12) there for so long but my existence did not seem to disturb her.
Leaves were still falling. Every day she played the violin at the comer of the building (13) I went downstairs to watch her performance. I was the only listener. The autumn seemed no longer lonely and life became (14) . (15) we didn’t know each other, I thought we were already good friends. I believe she also loved me.
Autumn was nearly over. One day, when I was listening carefully, the sound suddenly (16) . To my astonishment, the girl came over to me.
"You must like music from the violin." she said.
"Yes. And you play very well. Why did you stop’." I asked.
Suddenly, a (17) expression appeared on her face and I could feel something unusual.
"I came here to see my grandmother, but now I must leave. I once played very badly. It was your listening every day that (18) me. " she said.
"In fact, it was your playing (19) gave me a meaningful autumn," I answered, " Let’s be friends. "
The girl smiled, and so did I. I never heard her play again in my life. I no longer went downstairs to listen to her. Only thick leaves were left behind. But I will always remember the fine figure of the girl. She is like a (20) —so short, so bright, like a shooting star giving off so much light that makes the autumn beautiful.

Ⅱ. 完形填空/Close

A．shaking

B．hanging

C．falling

D．floating
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