问题 选择题

(10龙岩市5). 下列关于氧气的说法中,不正确的是

A.氧气用于炼钢,目的之一是除去生铁中多余的碳和其他杂质

B.将带火星的木条插入氧气瓶中,木条复燃

C.实验室可用双氧水与二氧化锰制取氧气

D.细铁丝在氧气中剧烈燃烧,生成氧化铁

答案

答案:D

A、氧气用于炼钢,目的之一是除去生铁中多余的碳和其他杂质,目的之二是为了提高炉温,故A项正确;

B、氧气能支持燃烧,所以将带火星的木条插入氧气瓶中,木条能够复燃,故B项正确;

C、实验室可用双氧水与二氧化锰制取氧气,故C项正确;

D、细铁丝在氧气中剧烈燃烧,生成黑色的四氧化三铁,故D错误;

故选D.

阅读理解

Mr. Patrick was new to the school and to us. Even though he was a great teacher, he seemed rather like a character out of a horror movie. He didn’t look that bad, but somehow, he looked extremely scary to me.

Some kids began to believe that he was a murderer or a ghost; some believed he was mad and a few believed that he might have suffered a lot in his life. I was one of those ‘few’.

One day I gathered up my courage and headed towards the school garden. He was, as usual, sitting on a bench alone. I breathed heavily a few times and then walked towards him.

“How are you?” I asked with my voice crackling.

He managed to say, “Fine.”

“Well, good to know,” I tried to be happy.

“Hmmm…” was all I heard.

“What’s up with you?” then seeing a puzzled look on his face, I tried to be more formal and respectful. “I mean, why aren’t you like all other people in the school? Why are you always so quiet and sad? Why…”

“No dear, some things are better left unsaid,” he said gloomily.

“Oh no sir, nothing is better left unsaid. If you want to share your feelings with me and reduce the pain of your heart, you are free to do so. I promise I will never ever tell anyone.”

“With you? You are just a little girl; what will you understand?”

I was somehow offended but still I managed to persuade him, “So what, Sir? You see, if you tell me your problem, you will have a light heart and you will have the feeling that someone somewhere cares about you.”

“Oh okay, that was a very nice belief indeed; let’s take a walk and I will let you know everything.”

Soon after our little talk, there was a visible change on his face. Later that day in the class, there was a smile on his face.

小题1:From the text, we can know about Mr. Patrick that he       .

A.once acted a character in a horror movie

B.scared his students with his looks

C.often punished the students for bad marks

D.did better in teaching than others in the school小题2:Mr. Patrick was thought by the author to       .

A.be a murderer or a ghost

B.be mad

C.have suffered a lot

D.have a special personality小题3:While walking towards Mr. Patrick in the school garden, the author felt       .

A.excited

B.nervous

C.worried

D.happy

问答题 简答题