液体粘度随温度升高而____，气体粘度随温度升高而____

A、减小，增大

B、增大，减小

C、减小，不变

D、减小、减小

此题为判断题(对，错)。

气体的粘度随压力增高而增高。在低压时，气体粘度随温度升高而增加，随着压力的增加，温度升高对粘度增大的影响越来越小，当压力很高时（100×105Pa以上），气体粘度随温度升高而降低，明显表现出类似于液体的性质。Table 1-13 shows the dynamic viscosity of methane at different pressures and temperatures. It can be seen from the table that the viscosity of gas increases with the increase of pressure. At low pressure, the gas viscosity increases with the increase of temperature. With the increase of pressure, the influence of temperature increase on the increase of viscosity becomes smaller and smaller. When the pressure is very high (100×105Pa and above), the gas viscosity decreases with the increase of temperature, showing obvious properties similar to liquid.

A.液体的粘度随温度降低而减小

B.气体的粘度随温度升高而减小

C.运动粘度与密度成反比

D.运动粘度与动力粘度成反比

E.液体的粘度随温度降低而增加

此题为判断题(对，错)。

A.液体和气体粘度均增大;

B.液体粘度增大，气体粘度减小;

C.液体粘度减小，气体粘度增大;

D.液体和气体粘度均减小。

B、液体

C、固体

D、气液混合物