Molecular activity gives the rise to an apparent shear stress in gases which is more important than the cohesive forces and since molecular activity increases with temperature，the viscosity of a gas also increases with temperature.
查看答案
The viscosity of a gas decreases with temperature，but the viscosity of a liquid increases with temperature.
Newton's law of viscosity states that for a given rate of angular deformation of fluid the shear stress is directly proportional to the viscosity.
肺下界的体表投影
A. 在胸骨旁线平第5肋
B. 在锁骨中线平第6肋
C. 在腋中线平第7肋
D. 在肩胛线平第8肋
E. 在脊柱旁线平第11肋
纵隔
A. 位于两肺之间
B. 不与颈部相交通
C. 稍偏右侧
D. 其内有心及心包
E. 其内无结缔组织
微信支付 
支付宝支付