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问题
单项选择题
压缩空气泡沫系统的英文缩写是（）。
A.GPEP
B.FFP
C.AFFP
D.GAFS
答案
参考答案：
D
选择题
It is reported that a woman as well as two children ______ from a big fire yesterday.
A. was saved
B. were saved
C. had been saved
D. have been saved
查看答案
单项选择题
以下指示灯用于报警的颜色是（）。
A.白色
B.红色
C.黑色
D.蓝色
查看答案
