D sounds more formal than the rest.
Answer:
Each portable fire extinguisher should only be used for its specific type of fire. Class A extinguishers could cause a Class B fire to spread or electrocution in a Class C fire. A Class B extinguisher could fail to completely extinguish a Class A fire, causing the flame to re-ignite later.
The light colored material in areas of the mood is the earliest crust on the moon.
Answer:
both technicians are correct, I haven't taken the test
Answer:
(3) the compressor power, in kW. = 4.17KW
(4) the refrigeration capacity, in tons.= 4.905tons
(5) the coefficient of performance. = 4.1336
check attached files for other answers.
Explanation: