Answer:
I believe it returns the current database system date and time, in a 'YYYY-MM-DD hh:mm:ss.mmm' format.
No. Using the address will get you either the default site, or the first site declared. Web servers can host VirtualHosts, and rely on the site name to know which VirtualHost to serve. TMI, it's called name based virtual host, as opposed to the machine having many addresses then address based virtual hosts can be created.
ICF is a type of fusion energy research that attempts to initiate a nuclear fusion reaction by heating and compressing a fuel target. Its normally in the form of a pellet that most often contains a mix of deuterium and tritium.
A nuclear reactor is a device used to initiate and control a sustained nuclear reaction. Nuclear reactors are used at nuclear power plants for electricity generation.
Compare: they are both nuclear, they both produce energy, they both are used at power plants.
Contrast: ICF uses fusion, while a nuclear reactor is used to control a sustained nuclear reaction.
This is all I can help with. By the way, are you in rocket science? 'Cause this stuff is hard.
1. Option 3
2. Option 2
3. Option 3