question:
Multi-layer printed circuit boards have trace layers inside the board.
What makes up the inside of a multi-layer PCB?

answer: yes

question:
It is planned to begin serving global customers upon its completion in 2020.
When did the BeiDou-2 begin construction?

answer: no

question:
Soviet systems especially concentrate on mobility, after the lessons learnt in the Vietnam war between the USA and Vietnam.
What systems are really geared toward mobility?

answer: yes

question:
Switzerland also has one of the world's largest account balances as a percentage of GDP.
How did the European Union rank Switzerland's economy?

answer:
no