What makes a parliamentary government different from the United States? It has a unitary central government that exercises complete control over smaller units of government, like states.
It does not have a president or other executive authority, that enforces laws and policy separate from lawmakers.
Its local or individual state governments have full sovereignty and only coordinate activities for mutual defense.
Its legislature has authority over the executive branch, with the ability to select and remove executive leaders.

question as stated in comment

why did the chinese require the portuguese to pay for goods in gold and silver when trading?

choices

portuguese goods were less valuable than chinese goods.

the chinese already had a surplus of portuguese goods.

the imperial government wanted to stockpile gold and silver.

portuguese and chinese currencies were not exchangeable.

this a history q n in ancient time, theres no money exchange. so ans is portuguese and chinese currencies were not exchangeable.

but equal

explanation:

plessy v. ferguson (1896) is an important us supreme court decision that kept racial segregation based on "separate but equal". however, these racially segregated trains and places were not actually equal. plessy v. ferguson (1896) was finally overturned by brown v. board of education in 1954.