This improves cooling efficiency and prevents evaporation of the coolant.

In evaporation, surface source owns better thickness uniformity.

In evaporation, surface source owns better thickness uniformity. A: 正确 B: 错误

Fourstrokesconsistofsuction,compression,（）andexhauststroke. A: combustion B: condensation C: charging D: evaporation

Which of the following is not the way of heat loss? () A: Shivering B: Radiation C: Conduction D: Convection E: Evaporation

中国大学MOOC: 电子束蒸发（Electron beam evaporation）比普通电阻丝加热蒸发增加了一个

Evaporation from sea water is about 5% less than from fresh water, ______(当其他所有条件都相同时).

Which of the following is not the function of skin？ A: Direct contact with the world B: Keep body temperature constant C: Prevent the evaporation of body fluid D: Prevent bacteria invasion

电子束蒸发（Electron beam evaporation）比普通电阻丝加热蒸发增加了一个 。 A: 电阻丝 B: 热丝 C: 真空系统 D: 偏转电子枪

We expect our website to become an effective information resource and are committed to maintaining a high level of transparency and____. A: evaluation B: evaporation C: extinction D: disclosure