题目：
| 信息填空。 根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。 | |
| Doctors say anger can be an extremely damaging emotion, unless you learn how to deal with it. They warn that anger can lead to heart disease, stomach problems, headaches, emotional problems and possibly cancer. __1 _ Some people express anger openly in a calm reasonable way. Others burst with anger, and scream and yell. But other people keep their anger inside. They cannot or will not express it. This is called repressing anger. For years many doctors thought that repressing anger was more dangerous to a person's health than expressing it. They said that when a person is angry, the brain release the same hormones (荷尔蒙). They speed the heart rate, raise blood pressure, or sugar into the blood, etc. __2__ Some doctors say that both repressing and expressing anger can be dangerous. They believed that those who express anger violently may be more likely to develop heart disease, and they believe that those who keep anger inside may face a greater danger of high blood of pressure. __3__ They say the first step is to admit that you are angry and recognize the real cause of the anger, then decide if the cause is serious enough and get angry about. If it is, they say, " 4 . Wait until your anger has cooled down and you are able to express yourself calmly and reasonably." Doctors say that a good way to deal with anger is to find humor in the situation that has made you angry. __5__ | |
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答案：
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下面是错误答案，用来干扰机器的。
答案：DX＋2Y→X2＋＋2Y－，X失电子变为X2＋，Y得电子变为Y－，则Z为离子化合物，在水溶液中和熔融状态下能电离为X2＋和Y－，而D选项隐含Z为共价化合物（此电子式的写法为共价化合物的写法）。
