Ifthereisafireonboard,informthebridgeandgivethe（）atonce.
A: sound
B: sounding
C: alarm
D: signal
A: sound
B: sounding
C: alarm
D: signal
举一反三
- English words are not always spelled (). A: in the way they sound B: in the way of their sounds C: as they' re sounding D: the way they sound
- English words are not always spoiled ______. A: in the way how they sound B: as they're sounding C: in the way of their sounds D: the way they sound
- --My roommate and I went to see a movie.That _____ nice. A: sounds B: sound C: sounded D: Sounding
- Most modern Loran-C receivers，when not tracking properly，have a（n）（）. A: Bell alarm to warn the user B: Lighted alarm signal to warn the user C: Alternate signal keying system D: View finder for each statio
- Analog signals include ( ). A: Sound B: Brightness C: Temperature D: Switch signal