问题
问答题 简答题
简述波尔多液的配制方法。
答案
参考答案：
采用1∶1∶100的比例，原料为CuSO4、石灰、水。
优良的波尔多液呈胶体悬液状。配制顺序：先用1/10的水制成石灰乳。9/10配成CuSO4溶液。然后把CuSO4液慢慢地倒入石灰乳中，并强烈搅拌。或对半制液再倒入第三桶中。
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简述波尔多液的配制方法。
参考答案：
采用1∶1∶100的比例，原料为CuSO4、石灰、水。
优良的波尔多液呈胶体悬液状。配制顺序：先用1/10的水制成石灰乳。9/10配成CuSO4溶液。然后把CuSO4液慢慢地倒入石灰乳中，并强烈搅拌。或对半制液再倒入第三桶中。
| 完形填空：阅读下面的短文，从短文后各题所给的A、B、C、D四个选项中选出能填入空白处的最佳答案。 | ||||
| Different countries have different manners. 1 entering a house in some Asian countries it is good manners to take off your shoes. In European counties, 2 shoes sometimes become very muddy (多泥的), this is not done. A guest in a Chinese house 3 finishes a drink. He leaves 4 to show that he has had enough. In a Malay house, too, a guest always leaves a little food. In England, a guest always finishes a drink to show that he has enjoyed it. Here are some examples of the things that a well-mannered person does or does not do. He never 5 people when they are in trouble. 6 , he tries to help them. He is always kind 7 to people or to animals. When people are waiting for a bus, he takes his 8 . He does not push to the front of the queue. In the bus, he gives his seat to an old person or a lady who is standing. If he accidentally knocks into someone, or 9 their way, he says "Excuse me" or "I'm sorry". He says "Please" when he makes a request and "Thank you" when he receives something. He stands up when speaking to a lady or an old person, and he does not sit down 10 the other person is seated. | ||||
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