不锈钢发生晶间腐蚀的危险温度区域为()t。
A.100~200
B.1100—1200
C.450—850
D.2100—2200
参考答案:C
A fire in the galley ALWAYS poses the additional threat of().
A.contaminating food with extinguishing agent
B.spreading through the engineering space
C.causing loss of stability
D.a grease fire in the ventilation system
触电急救中,在现场抢救时不要为了方便而随意移动触电者,如确需移动触电者,其抢救时间不得中断()。
A.30s;
B.40s;
C.50s;
D.60s。