高卧东山
第11楼2008/04/29
自己看,并请注意旁边英文说明
http://images.google.com/imgres?imgurl=http://dl.clackamas.edu/ch104-02/images/104vol15.jpg&imgrefurl=http://dl.clackamas.edu/ch104-02/volume_meas.htm&h=82&w=141&sz=2&hl=en&start=1&tbnid=RvE7wYBBnLdgxM:&tbnh=55&tbnw=94&prev=/images%3Fq%3Dmercury%2Bmeniscus%26gbv%3D2%26hl%3Den%26newwindow%3D1%26sa%3DG