设现行数据段位于存储器0B0000H～0BFFFFH单元，DS段寄存器内容为多少？
参考答案：
DS段寄存器内容为0B000H。
广场、体育场、飞机场用的照明灯（俗称“人造小太阳”）中充填的气体是（ ）
A．氮
B．氖
C．氙
D．氩
Each fireman’s outfit and its spare equipment on a vessel must be stowed（）.
A.in a locked cabinet in the machinery space
B.in an unlocked cabinet in the machinery space
C.in a separate and accessible location
D.at a fire hydrant location
