问题 选择题

苹果联建公司用价格更低的正己烷代替酒精清洗电器零部件,已造成许多工人中毒。关于正己烷的叙述错误的是

A.分子式为C6H14

B.属芳香烃

C.有毒

D.易挥发

答案

答案:B

A正确,根据烷烃的通式CnH2n+2可得己烷分子式为C6H14

B错,芳香烃为含有苯环的烃,己烷为烷烃,链烃;

C正确,由题意可得己烷有毒;

D正确,己烷为易挥发的液体;

阅读理解

阅读理解。

      There was once a captain who loved money so much that he cheated his sailors at the end of every

voyage and took their wages.

      On the last day of one voyage, the ship was in a small port. It was winter time, and the sea was very

cold, so the captain said to his sailors, "If one of you stays in the water during the whole night, I will give

him my ship. But if he comes out before the sun appears, I shall get his wages."

      The sailors had heard about the captain's cheating, so they didn't trust him. But then one of them, who

thought that he was cleverer than the captain, said that he would do it. He got into the water, and, though

it was very cold, he stayed in it. When it was nearly morning, some fishermen lit a fire on the shore about

half a mile away.

       "You are cheating," the captain said to the sailor. "The fire's warming you."

       "But it's half a mile away!" said the sailor.

       "A fire's fire," answered the captain. "I have won."

       The sailor came out of the water, and said, "Perhaps you think that you are clever because you have

won my wages, but you can't cook a chicken."

       "I can," answered the captain.

       "If you cook this chicken," said the sailor, "I shall work for you without wages for seven years, but

if you can't, you will give me your ship."

       The captain agreed, took the chicken and said, "Where's the fire?"

       "There it is," answered the sailor. "On the shore." 

       "But it's half a mile away," said the captain angrily.

       " 'A fire's fire,' you said," answered the sailor. "If it is enough to warm me in the water, it is enough

to cook your chicken."

1. The captain got the sailors' wages _____. [ ]

A. to buy a chicken for himself

B. and kept the money for future use

C. by cheating him

D. and said he would return the money soon

2. Which of the following statements is TRUE? [ ]

A. All the sailors refused to get into the water because it was too cold.

B. The captain knew that the fire the fishermen made was enough to warm the sailor in the water.

C. The captain succeeded in cheating the sailor.

D. It was the sailor who was cleverer.

3. The captain insisted that the fire was warming the sailor because he _____. [ ]

A. didn't want to lose the bet

B. didn't believe the sailor's success

C. wanted to keep his promise

D. wanted to show his cleverness

4. Which of the following statements is NOT TRUE?[ ]

A. The sailors didn't trust the captain.

B. In order to help the sailor in the water, the fishermen made a fire.

C. The captain failed to cheat the sailor this time.

D. The sailor didn't get out of the water before the sun appeared.

5. What is the title of the story? [ ]

A. How a Captain Cheated His Sailor

B. How a Sailor Got a Ship

C. A Brave Sailor

D. A Fire Is Fire

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