如果温度降到-20摄氏度，拆下电瓶。

When it is unlikely that the temperature decreases to -20 ℃, remove the batteries.

If it is possible that the temperature will decrease to -20 ℃, remove the batteries.

If it is possible that the temperature will decrease to -20 ℃, cut the cells.

正确答案：B

The AC power system design prevents two sources to the same load at the same time.

STE regulates the way to express the content but it does not regulate formatting (for example, typeface, numbering, and etc.).

If you show the maintenance page too early, it will show the data from the previous time the test ran.

Thrust reverser produces the braking force by deflecting the exhaust gas stream to the opposite direction.

The engine oil carries these particles until they are caught in an oil filter.

Drain or use the potable water system a minimum of one time each three days.

The sensor of the engine fire detection system is always a dual continuous loop.

Each rule includes explanatory text and the related examples.

If the initialization setup is correct, AUTOTEST IN PROGRESS will show on the CDU display.

Inspection is accomplished from the ground, without the use of stands or ladders.