喷射机操作顺序（）。
A.先开风后给水
B.先送电后给风
C.先开水后给风
参考答案：A
—We can see the sign in the public places. What does it mean?
—It means _____. [ ]
A. NO PHOTOS
B. NO FISHING
C. NO PARKING
D. NO SMOKING
in the public places. What does it mean?