The higher the sand concentration, the higher the conductivity.

Which are corrrect for choosing proppant A: for low permeability formations,the fracture mainly is requires to increases the length B: for low permeability formations,the fracture mainly is requires to increases fracture conductivity C: for medium or high permeability formations,the fracture mainly is requires to increases the length. D: for medium or high permeability formations,the fracture mainly is requires to increases fracture conductivity.

The thermal conductivity of ice at 0°C is approximately ______ times the thermal conductivity of water at the same temperature, indicating that in the same environment, ice can change its temperature faster than water.

A．commonplaceB．responsibilityC．conductivityD．consequence A: commonplace B: responsibility C: conductivity D: consequence

Because semiconductor has two kinds of carriers, it has better conductivity than conductor

This is the governing equation(基本方程)with the thermal conductivity(导热率)a function(函数) of temperature.

A major objective in designing new ceramics is to overcome A: Hardness B: Brittleness C: Reactivity D: Conductivity

In the electrophoresis experiment of Fe(OH)3 colloid, the temperature and conductivity of the auxiliary solution should be equal to that of the colloid.

People experience differences in physical and mental ______ depending on the time of day. A: community B: conductivity C: celebrity D: capability

Which is NOT the characteristic of “COTTON”？ A: low absorbency B: good heat conductivity C: soft hand D: tend to wrinkle