正确的实验操作对实验结果和人身安全十分重要。下列实验操作不正确的是

    Why read, and sometimes even write poetry? That question is not difficult to answer if we change the word poetry to songs.

    I sing when I feel good. When I sing my favorite songs, I feel even better. Sometimes when I am listening to music and to the song words, I feel that it was written for me. A good song always makes me feel something. There are songs that I sing in my head between classes and songs that I want to sing when the school bell rings by the end of the day. They help me get through the day.

    They are like bright and warm colors in the middle of grays and shades. I like songs about love and friendship. The extraordinary thing is that my feelings are more special when I sing my favorite songs in English.

    I also like reading. I used to avoid poetry until an e-friend told me I should recite poems and not look up the meaning of the words. Poetry uses many difficult words and idioms, but the best thing is to just forget about them. In the beginning I felt quite strange. Now I always lock the door. Reading aloud gives you a strange feeling, but when you have some practice and fall into the rhythm, and the sounds of the words, it is really a special experience.

    I started with small poems, but now I think I most like long poems. I have different feelings with different poems. When I have had a bad day at school, I read Keats and forget everything. When I am sad I read Wordsworth by the light of a candle. When the poem is finished, I close the book and my sadness is gone.

（2015•广东佛山）

 Bert Manson, 82, slowly opened his eyes and turned to face the clock on the bedside table. It was 8:23 a.m. He felt1. The time was nothing to him. He had nothing to do all day. He lay on the bed, 2 to the cars on the highway and the shouts of the children running to school.

 After a while, Bert 3 got out of bed and asked himself the same questions as he did every morning: Would he fall today? If so, would anyone come? How long would he 4? Would he die? He looked out of the window into the street below. “And who would 5?”he spoke quietly.

 After Bert's wife died a year ago, his son and daughter said they would visit once a week. But the last time was months ago. On the phone, they always had a(n)6: too busy at work; the children are 7; bad weather; no time. Nobody seemed to have any time…except for Bert. He 8 his granddaughters. He loved it when Mandy and Ruth came to visit. They brought him candy and 9.

 He walked to a chair near the bedroom door 10. He rested for a moment before continuing in small steps to the bathroom.

最近，很多国内旅行对参加港澳游的顾客作出规定，专门针对老人（60岁以上）、小孩（18岁以下）、老师及新闻媒体人员在原价基础上加收每人300元。记者在随后的调查中发现，对老人、孩子、教师、新闻媒体从业人员的港澳游收取高价的做法，已成为旅游业的“惯例”，理由是以上四类人员“购买力较低”。请针对以上现象请回答下列小题。

这种“将游客划分等级，按不同标准收费”的做法主要侵犯了消费者的（    ）