下列有关化学反应现象或化学原理的解释正确的是（ ）
| 选项 | 现象或反应 | 原理解释 |
| A | KI淀粉溶液中滴入氯水变蓝，再通入SO2，蓝色褪去 | SO2具有漂白性 |
| B | 合成氨反应需在高温条件下进行 | 该反应为吸热反应 |
| C | 蒸馏时，温度计的球泡应靠近蒸馏烧瓶支管口处 | 此位置指示的是被蒸馏物质的沸点 |
| D | 2CO=2C+O2在任何条件下均不能自发进行 | 该反应△H＞0，△S＜0 |
A．A
B．B
C．C
D．D
A．KI淀粉溶液中滴入氯水变蓝，说明生成碘，再通入SO2，蓝色褪去，原因是碘和二氧化硫发生氧化还原反应，二氧化硫表现出还原性，故A错误；
B．合成氨的反应为放热反应，采用高温主要是考虑反应速率和催化剂的活性，故B错误；
C．蒸馏时，温度计用于测量分离馏分的温度，即被蒸馏物质的沸点，故C正确；
D．当△G=△H-T•△S＜0时，反应可自发进行，对于△H＞0，△S＜0的反应，如在很高的温度下，反应可进行，故D错误．
故选C．
IV. PART FOUR WRITING( 45 points) SECTION A (8 points) Directions: Read the following passage. Complete the diagram/Fill in the numbered blanks by using the information for the passage. Write NO MORE THAN 3 WORDS for each answer. Today anyone will accept money in exchange for goods and services. People use money to buy food, furniture, books, bicycles and hundreds of others they need or want. When they work, they usually get paid in money. Most of the money today is made of metal or paper. But people used to use all kinds of things as money. One of the first kinds of money was shell. Shells were not the only things used as money. In China, cloth and knives were used. In parts of Africa, cattle were one of the earliest kinds of money. Other animals were used as money, too. The first metal coins were made in China. They were round and had a square hole in the center. People strung them together and carried them from place to place. Different countries have used different metals and designs for their money. The first coins in England were made of tin. Sweden and Russia used copper to make their money. Later, other countries began to make coins of gold and silver. But even gold and silver were inconvenient if you had to buy something expensive. Again the Chinese thought of a way to improve money. They began to use paper money. The first paper money looked more like a note. Money has had all interesting history from the days of shell money until today. Title：The 68_______ of money
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