Someone gave the alarm. The great ship turned.The turning is sharp.The ship wanted to avoid a collision. A collision was direct. A: After the alarm had given, the great ship turned sharply to avoid a direct collision. B: Before the alarm had been given, the great ship turned sharply to avoid a direct collision. C: After the alarm had been given, the great ship turned sharply to avoid a direct collision. D: When the alarm had been given, the great ship turned sharply to avoid a direct collision.

The alarm management mode of DVR (non-manual alarm) includes ( ) A: External contact alarm mode B: External API alarm mode C: VMD alarm mode D: Timing alarm mode

The policemen went in to action ______ after they heard the alarm.

______ , she went back to sleep. A: There was no cause for alarm B: There being no cause for alarm C: Without having cause for alarm D: Being no cause for alarm

______, she went back to sleep. A: There is no cause for alarm B: Being no cause for alarm C: There being no cause for alarm D: Without having cause for alarm

The policemen took action and rushed into the building（）(direct) they heard the alarm.

The policemen went into action___they heard the alarm. A: promptly B: presently C: quickiy D: directly

The policemen went into action______when they heard the alarm. A: promptly B: presently C: quickly D: directly

alarm闹铃，闹钟；警钟

Smoke alarm is very important.