Traditionally，the signal for fire aboard ship is（）.
A. more than 6 short blasts and 1 long blast on the whistle，and the same signal on the general alarm
B. continuous sounding of the ship's whistle and the general alarm for at least 10 seconds
C. 1 short blast on the whistle
D. alternating short and long blasts on the ship's whistle
微信支付 
支付宝支付