There is a "is" before "yet to be" in the second sentence and there isn't in the first.Why?
Incomplete market system and emergency response capability( yet to be) enhanced. China's energy market system (is yet to be) completed, as the energy pricing mechanism fails to fully reflect the scarcity of resources, its supply and demand, and the environmental cost.
THANK YOU!!!!!!!!!!!!!!

Question

There is a "is" before "yet to be" in the second sentence and there isn't in the first.Why?
Incomplete market system and emergency response capability( yet to be) enhanced. China's energy market system (is yet to be) completed, as the energy pricing mechanism fails to fully reflect the scarcity of resources, its supply and demand, and the environmental cost. 
THANK YOU!!!!!!!!!!!!!!

Answer

I found the original text after a quick search.

The first sentence is a heading, and uses a reduced form of English.  The second sentence is part of the paragraph, and follows regular grammar rules.

Verpassen Sie nicht die Gelegenheit, bequem von zu Hause aus eine Sprache zu lernen. Stöbern Sie in unserer Auswahl an erfahrenen Sprachlehrern und melden Sie sich jetzt zu Ihrer ersten Unterrichtsstunde an!