Answer:
The characteristics that the US has in common with the Roman Republic is that it is a republic, it limits elected officials' terms, representatives are elected, the government's duties are split up.
Explanation:
It is a republic; is correct because both the US and the Roman Republic fall into this category.
It limits elected officials' terms; is correct because the officials only get a certain amount of time from one election.
In emergencies, a dictator rules; this is not correct because there has not been such occurrence in the US.
Representatives are elected; is correct because in both of them elections have been and are held.
The head of state is called a consul; this is not correct because a consul has not been in charge of either of the two.
The government's duties are split up; is correct because the government has numerous representatives, all of which with a special task to perform.