单项选择题
Engine room is（）fire.
A.on B.in C.at D.out
单项选择题 Floating, caused by winds and current with a determinable direction defines（）.
单项选择题 Floating, not controlled, without a clearly determinable direction means（）.
单项选择题 How should the number 1 be pronounced when spoken on the radiotelephone?（）.
