浮球式液位计测液位，当液位下降时，浮球所受浮力减小，浮球沿导轨下移，带动指针指示出液位高度。
参考答案：错
女性，19岁，右股骨下端疼痛3个月。X线片如图。诊断应考虑（）
A.骨肉瘤
B.软骨肉瘤
C.骨巨细胞瘤
D.纤维肉瘤
E.动脉瘤样骨囊肿
— This city is a dull place to live in.
— How surprising that you ________ think so! I love it very much. [ ]
A. shall
B. must
C. might
D. should
