问题 选择题

下列物质的用途,主要利用其化学性质的是(  )

A.石墨用作电极

B.氧气用于气焊

C.干冰用作人工降雨

D.用25%~50%的酒精给高烧患者擦拭身体退热

答案

A、石墨用作电极是利用了石墨的导电性,属于石墨的物理性质;

B、氧气用于气焊是利用氧气支持燃烧的性质,助燃性属于物质的化学性质,故此项正确;

C、干冰用作人工降雨是利用了干冰升华时能吸收热量,从而使水蒸气凝结成雨水,干冰的这种性质不需要通过化学变化表现出来,属于干冰的物理性质;

D、用25%~50%的酒精给高烧患者擦拭身体退热是利用了酒精的挥发性,挥发性是物理性质.

故选B.

阅读理解

He's an old cobbler  (修鞋匠)  with a shop in the Marais, a historic area in Paris. When I took him my shoes, he at first told me: “I haven't time. Take them to the other fellow on the main  street ; he'll fix them for you right away.”

But I'd had my eye on his shop for a long time. Just looking at his bench loaded with tools and pieces of leather, I knew he was a skilled craftsman  (手艺人).  “No,” I replied, “the other fellow can't do it well.”

“The other fellow” was one of those shopkeepers who fix shoes and make keys “while-U-wait”— without knowing much about mending shoes or making keys. They work carelessly, andwhen they have finished sewing back a sandal strap (鞋带) you might as well just throw away thepair.

My man saw I wouldn't give in, and he smiled. He wiped his hands on his blue apron ( 围裙), looked at my shoes, had me write my name on one shoe with a piece of chalk and said,“Come back in a week.”

I was about to leave when he took a pair of soft leather boots off a shelf.

“See what I can do?” he said with pride. “Only three of us in Paris can do this kind of work.. ”

When I got back out into the street, the world seemed brand-new to me. He was something out of an ancient legend, this old craftsman with his way of speaking familiarly, his very strange,dusty felt hot, his funny accent from who-knows-where and, above all, his pride in his craft.

These are times when nothing is important but the bottom line, when you can do things any old way as long as it “pays”, when, in short, people look on work as a path to ever-increasing consumption  (消费) rather than a way to realize their own abilities. In such a period it is a rare comfort to find a cobbler who gets his greatest satisfaction from pride in a job well done.

60. Which of the following is true about the old cobbler.'?

A. He was equipped with the best repairing tools. B. He was the only cobbler in the Marais.

C. He was proud of his skills.                             D. He was a native Parisian.

61. The sentence “He was something out of an ancient legend.” ( paragraph 7 ) implies that      

A. nowadays you can hardly find anyone like him

B. it was difficult to communicate with this man

C. the man was very strange                               D. the man was too old

62. According to the author, many people work just to           .

A. realize their abilities   B. gain happiness          C. make money             D. gain respect

63. This story wants to tell us that           .

A. craftsmen make a lot of money                       B. whatever you do, do it well

C. craftsmen need self-respect                             D. people are born equal

单项选择题