單項(xiàng)選擇題A definite advantage of using water as a fire extiguishing agent is its characteristic of（）.

A.alternate expansion and contraction as water in a liquid state becomes a vapor
B.absorption of smoke and gases as water is converted from a liquid to a vapor
C.rapid contraction as water is converted from a liquid to a vapor
D.rapid expansion as water absorbs heat and changes to steam


您可能感興趣的試卷

你可能感興趣的試題

1.單項(xiàng)選擇題A design modification of an anchor chain which prevents kinking is the（）.

A.detachable link
B.stud link
C.Kenter link
D.connection link

2.單項(xiàng)選擇題A device fitted over the discharge opening on a relief valve consisting of one or two woven wire fabrics is called a（）.

A.flame stopper
B.flame screen
C.flame filter
D.flame restrictor

4.單項(xiàng)選擇題A Doppler log in the bottom return mode indicates the（）.

A.velocity of the current
B.bottom characteristics
C.depth of the water
D.speed over the ground

5.單項(xiàng)選擇題A Doppler log in the volume reverberation mode indicates（）.

A.speed being made good
B.speed through the water
C.the set of the current
D.the depth of the water