单项选择题
Which of the following statements describes the relationship between flash point and ignition temperature?（）
A.Both are higher than normal burning temperatures B.The flash point is always higher C.The ignition temperature is always higher D.They are not necessarily related
单项选择题 Flexible hose under pressure in a hydraulic system will （）.
单项选择题 An air compressor can be unloaded at start-up by （）.
单项选择题 Machinery driving fuel oil transfer and fuel oil service pumps must be fitted with a remote means of stopping the machinery from （）.
