Both the temperature and the pressure of the refrigerant are increased in the _____.

An isotherm is ______.

A.a line on a weather map connecting equal points of both temperature and pressure

B.an instrument that measures the climatological effects of temperature

C.a line connecting points of equal barometric pressure on a weather map

D.a line connecting points of equal temperature on a weather map

A、Both the temperature and the pressure are the pressure are not the same.

B、The temperature is the same, but the pressure of the helium is larger than that of nitrogen.

C、Both the temperature and the pressure are the same.

D、The temperature is the same, but the pressure of the nitrogen is larger than that of helium.

A.I only

B.II only

C.Both I and II

D.Neither I nor II

A.its pressure and temperature are both lowered

B.its pressure and temperature are both raised

C.its pressure is lowered and its temperature is raised

D.its pressure is raised and its temperature is lowered

A．line on a weather map connecting equal points of both temperature and pressure

B．an instrument that measures the climatological effects of temperature

C．a line connecting points of equal barometric pressure on a weather map

D．a line connecting points of equal temperature on a weather ma

A.stand by

B.put up with

C.withhold

D.withstand

A.Both are prepared using high temperature pyrolysis

B.Both are pyrolyzed above 2000 Both are pyrolyzed above 2000℃

C.Both are based on polyacrylonitrile precursor fibers

D.Both are mainly composited of carbon

A.Europa has a larger diameter than does Jupiter.

B.Europa has a surface made of rocky material.

C.Europa has a surface temperature of 20°C.

D.Europa is completely covered by a layer of ice.