<dfn id="i6kg0"></dfn>

<strike id="i6kg0"></strike><samp id="i6kg0"><tbody id="i6kg0"></tbody></samp>

單項(xiàng)選擇題

The boiling and condensation points of a refrigerant depend on the （） exerted upon it.

A.temperature
B.pressure
C.velocity
D.heat

你可能感興趣的試題

單項(xiàng)選擇題

Faulty operation of any system is indicated by very definite （）.

A.symptoms
B.samples
C.traces
D.tracks

單項(xiàng)選擇題

The refrigerating agent can （） at low temperature in the evaporator.

A.expand
B.evaporate
C.condense
D.distil