答案:D
解:A、三角形的底×高= 面积(一定),是乘积一定,成反比例,此句正确; |
B、长方形的长+宽=

周长(一定),是和一定,不是乘积或比值一定,不成比例,此句正确;
C、订《少年报》的总价÷份数=单价(一定),是比值一定,成正比例,此句正确; |
D、圆周长C=πd,但π是定量,不随着d的变化而变化,所有π与d不成比例,原句错误; |
故选:D.
阅读理解
请仔细阅读第1-5题五位人员的个人情况说明,从A-F中选出能解决他们问题的恰当建议。 (有1个多余选项) | I. Students' problems ( )1. My mother is a doctor. She is too busy with her work to spend the weekends with me. It seems that she doesn't care me at all. I feel lonely. ( )2. I am too shy to speak in front of my classmates. They always laugh loudly when I am answering teachers' questions. ( )3. I am not allowed to meet friends at all. My parents want me to study all the time at home. I feel unhappy. ( )4. I think I work harder than others but I get bad grades. Am I too stupid? ( )5. A senior high school student asked me to give him ¥100 every week without telling others. I am frightened, so I don't want to go to school now. | II. Some good advice A. Nobody was born stupid. Maybe you haven't got right ways of study yet. Ask the teachers or classmates for help if you have any questions. B. Your classmates may not laugh at you. If you don't like their laugher, you should talk to them about your feelings. They might understand you. And you had better be more easygoing and be their friend. C. If you feel unhappy, go to have a good sleep and you will forget everything unhappy. D. Don't be afraid. You should tell your parents or teachers at once. Don't go out alone then. E. Let your parents know your friends are nice. You learn a lot from them as well as have fun with them. You study with them outside, too. F.Tell your mother you need her company sometimes. Also you should do some housework with your mother so she can finish her work quickly. Try to understand her, too. |
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