When is it essential to take measures to release trapped cfc, hcfc, or hfc refrigerant from the compressor oil during refrigerant recovery?

Use a physical stopwatch to record the length of time it takes to run the program. calculate the difference obtained by calls to the method system. currenttimemillis() just before the start of the algorithm and just after the end of the algorithm. calculate the difference obtained by calls to the method system. currenttimemillis() at the start of the program and at the end of the program so that the elapsed time includes the display of the result. use the value returned by the method system. currenttimemillis() just after the end of the algorithm as the elapsed time.

Some peer-to-peer networks have a server and some don't. true false

Why do we mark tlc plates with pencil and not with pen