The lower-level classes(known as subclasses or derived classes) ( )state andbehavior from the higher-level class(known as a super class or base class).

单选题

The lower-level classes(known as subclasses or derived classes) ( )state andbehavior from the higher-level class(known as a super class or base class).

答案解析

单选题

if the water level cannot be seen in the lower part of the boiler gauge glass, which of the following actions must be carried out immediately?

答案解析

单选题

If the ambient temperature on the ground is 20°F (6°C) or lower at an arrival location and a fluid level is below REFILL, service the reservoir to just above REFILL to avoid the overflow of fluid at the next warmer location.

答案解析

单选题

The lower seal comes into view when you pull the lower bearing down.

答案解析

单选题

Lower the antenna to get access to the cable connector.

答案解析