从集合{1,2,3，…，10}中任意选出三个不同的数，使这三个数成等比数列，这样

发布时间：2017-04-30 12:19 │ 来源：www.tikuol.com

题型：填空题

从集合{1,2,3，…，10}中任意选出三个不同的数，使这三个数成等比数列，这样的等比数列的个数为________．

完形填空。
My brother doesn't like doing exercise. Last night he __1__ again and again. Today my father took him to see a __2__ . The doctor said that my brother had a bad __3__ . He told my father to buy some __4__ and told my brother to have a good rest. __5__ happened to my brother? My brother said he kept the windows __6__ all night. But my father thought that my brother __7__ do more exercise every day. After taking __8__ medicine, he was much __9__ . My mother told us to take good care of ourselves. I will __10__ what my parents said. I will do more sports in the future.
( ) 1. A. cough ( ) 2. A. teacher ( ) 3. A. cold ( ) 4. A. water ( ) 5. A. What ( ) 6. A. close ( ) 7. A. may ( ) 8. A. a ( ) 9. A. good ( ) 10. A. forget	B. coughs B. friend B. headache B. medicine B. When B. closed B. can B. an B. better B. remember	C. coughed C. dentist C. toothache C. milk C. Where C. open C. mustn't C. the C. ill C. read	D. will cough D. doctor D. SARS D. hamburgers D. How D. opened D. should D. / D. worse D. write