流变学。
参考答案：
是研究物质变形与流动的科学。
— What do you think of teaching, John?
— I find it fun and challenging. It is a job ______ you are doing something serious but interesting. [ ]
A. what
B. which
C. where
D. that
某柱下条形基础，在间距为10m基础梁上进行3个点的沉降观测，A、B和C三点的沉降量分别为120mm、200mm和170mm，计算基础梁的挠度接近（）
A.100mm
B.140mm
C.18mm
D.20mm
