Answer:
There are different phases of railroad expansion with the innovations in technology.
Explanation:
Few of the technological innovations are described below that leads in railroad expansion more rapid.
1. Centralized Traffic control (CTC) is introduced in 1960's that is used to control the traffic on railroads using different signal control.
2. In 1990's after computer technology involvement, railway ticket and reservation system is automate and being centralized. That makes the railroad expansion improve.
3. Bullet train technology has been introduced, that makes the railway trains more faster.
4. Electric trains has been introduced to use green energy and reduce the dependency on the fuel to make environment clean and green.
It depends on what you're researching for.
The answer is A. The earth was formed 4.54 years ago, and during those first serveral hundred million years, oceans, continents started to form.
A) Precambrian time.
I think false not sure but let other people help u answer and u can decide
Answer: it means if you give a bad input it will result in a ad output.
Explanation:
It has n acronym GIGO which refers to how the quality of an output is determined by the quality of input.
Garbage is trash info... or input. And grabage out is the trash output.
