单项选择题
In cleaning up an oil spill, the use of chemical agents would （）.
A.absorb the oil for easy removal B.remove the oil from the water C.disperse or dissolve the oil in the water D.not affect the oil
单项选择题 Why is it necessary to warn engine room personnel before activating the fixed CO2 system?（）
单项选择题 The lowest temperature at which a liquid gives off enough vapor to ignite in the presence of an ignition source is called its （）.
单项选择题 An example of class "A" fire is a/an （）.
