A.corrosiveB.class B poisonC.oxidizerD.explosiveAccordi……

单项选择题A space should be ventilated when（）.

A.The cargo's temperature is colder than the dew point of the air in the space
B.The cargo's temperature is warmer than the dew point of the air in the space
C.The dew point of the air in the space is lower than the dew point of the outside air
D.All of the above

单项选择题（）is the most liable to spontaneous combustion.

A.Cement
B.Chinaware
C.Fish meal
D.Steel products