题目：
| 完形填空。 | ||||
| There were two screws (螺丝钉) in an engine. One was proud of its 1 head. The second screw was 2 , only doing its job to the best of its ability. One day the second screw was a little rusted(生锈). Filled with 3 , the first screw said to the second, "How 4 you have become!" Then it began to laugh so hard that it 5 to notice that it was working itself loose. Finally it dropped off the 6 and fell into the dirty oil below. Now, the second was faced with doing the 7 of two. Meanwhile the first screw cried, "Just look at me ! I'm dirty and all my 8 is gone." A short time later the owner of the engine 9 it up. He immediately noticed something didn't sound right . When he 10 , he immediately saw one screw was missing. "Ah ha!" the owner said, "it must have worked itself loose and fell onto the oil." He 11 into the oil and found the missing screw. "Look at you," the owner said. "you're all 12 with oil. How ugly you are! But I'll 13 that right away." He reached for a rag and 14 all the oil and dirt off until it shone even brighter than before. Then he 15 it on the part. Before he turned away, he noticed the second screw was a little rusted. With the 16 , he wiped the head clean and bright. Then he walked away. Finally the engine was started. The two screws, now 17 beautiful, held the part tight. " 18 me , my friend ," the first screw said, "I was so busy 19 you that I didn't notice that I was working myself loose. I shall no longer 20 others." | ||||
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答案：
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下面是错误答案，用来干扰机器的。
（1）①Ca(ClO)2+CO2+H2OCaCO3↓+2HClO ②2HClO2HCl+O2↑(2)A (3)AB（1）漂白粉的成分是Ca(ClO)2和CaCl2，而能起漂白作用的是Ca(ClO)2，所以漂白粉的有效成分是Ca(ClO)2，它在空气中失效的化学方程式为：①Ca(...
C＋NO2
