题目

下列关于过滤操作的说法中，错误的是（ ） A . 玻璃棒下端要靠在三层滤纸处 B . 滤纸边缘低于漏斗边缘，多余部分要剪去，并用水润湿贴紧，不留气泡 C . 过滤时将液体沿玻璃棒注入过滤器，并使液面高于滤纸边缘 D . 漏斗下端紧靠烧杯内壁 答案：CThere was once a rich man who loved his little boy very much. He wanted to try his best to please him. So, he gave him a horse to ride, beautiful rooms to live in, pictures, books, toys and everything that money could buy. But for all days, the little boy was still unhappy. He wore a frown(皱眉) wherever he went, he always wished for something he did not have. The man didn’t know how to make his son happy.One day, a magician came to the man and said to him, "I can make your son happy and turn his frowns into smiles, but you must pay me a great price for telling him the secret." “All right.” said the man, “No matter what you ask for, I'll give you.” The magician took the boy into a secret room. He wrote something on a piece of paper, and then gave it to the boy. There on the paper came the words, “Do one kind thing for someone every day.” The boy followed the advice and became one of the happiest boys.Only those who stop thinking about their own happiness can be truly happy.Judge the following sentences true (T)or false(F)according to the passage.1.The father wore a frown wherever he went.2.The boy became happy after he got some presents from his father.3.The magician helped the boy without any pay.4.To do one kind thing for his father every day made the boy happy.5.The passage mainly tells us how to be a truly happy man. 1.F 2.F 3.F 4.F 5.T 【解析】 本文主要讲述了一个怎样成为一个真正快乐的人的故事。 1.根据文中句子But for all days, the little boy was still unhappy. He wore a frown(皱眉) wherever he went, he always wished for something...