圆柱形容器内盛有高度为3cm的水,若放入三个相同的珠(球的半么与圆柱的底面半径相同)后,水恰好淹没最上面<img width="58" height="114" src="https://main.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/spacer.gif" alt="高考资源网(www.ks5u.com),中国最大的高考网站,您身边的高考专家。" word_img="file:///C:/Users/94084/AppData/Local/Temp/msohtmlclip1/01/clip_image002.jpg" style="background:url(https://main.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd"/><img width="132" height="118" src="https://main.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/spacer.gif" word_img="file:///C:/Users/94084/AppData/Local/Temp/msohtmlclip1/01/clip_image004.jpg" style="background:url(https://main.ahjxjy.cn/design/html/js/vender/ueditor/lang/zh-cn/images/localimage.png) no-repeat center center;border:1px solid #ddd"/>的球,则球的半径是[填空1]