在蒸发器的库房内，装有温度继电器，控制着（）等的“开”或“关”。
A.吸入电磁阀
B.供液电磁阀
C.氨泵
D.压缩机
参考答案：A, B, C, D
安全隔离变压器就是普通的低压灯变压器。
A fire is discovered in the forepeak of a vessel at sea. The wind is from ahead at 35 knots.You should（）.
A.remain on course and hold speed
B.change course and put the stern to the wind
C.change course to put the wind on either beam and increase speed
D.remain on course but slack the speed
