题干

《中国科学报》近日报道:美国波士顿银杏生物工作室以酵母为原来,创造出了一种新的人工培养的玫瑰油,该技术有利于利用新生物化学基础服务香水、化妆品甚至甜味剂灯行业的大门.天然玫瑰花中含有丁香酚等物质,丁香酚化学式为C10H12O2,下列有关丁香油酚的说法不正确的是(   )

A:丁香油酚属于化合物

B:丁香油酚是由碳、氢、氧原子构成

C:丁香油酚燃烧生成二氧化碳和水

D:丁香油酚分子做永不停息无规则运动

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答案(点此获取答案解析)

B

同类题4

任务型阅读

C

    I'm Sarah.I used to have little passion(激情)in my life.But what happened the other day changed my mind.It was then that I learned how important it is to have a passion in life.

    That day I went home in Mom's car.When Mom stopped at a red light.someone on the side of the road caught my eye.It was a man dressed in rags(衣衫褴褛).He was homeless.That didn't interest me.because I had seen many people like him before.Those people usually looked unhappy and hopeless.

    But this man was different in some way.He was not sitting alone with a sad look.Instead,he had a radio in his hand and was dancing happy to the music.The radio seemed to be the most precious(珍贵的)thing he had.

    Mom,why does mat man have a radio though he' s homeless?”I asked.

    “Maybe he bought it,”she replied.

    “But why didn't he use the money to buy food or clothes ?He paid for something that he didn't need.”

    “Well, Sarah, sometimes food and clothes aren't me most important.''

That man must care so much about music that he bought a radio instead of food or clothes.I soon realized that happiness is the key to life.

Since then I am always thinking of what is truly important in life.A home,a meal,clothes—these things are only part of the life.What we often forget is that we all need a joy,a light on a dark day.We all need a passion which gives a person the happiness they need to keep going.