Which of the following was the system that Brunelleschi used in his architectural designs? 1. flying buttresses
2. Italian cruxes
3. double helix
4. double wall

Which of the following was as a provision of the chinese exclusion act that affected chinese immigrants who were already in the united states ? a. the act forced chinese to return to china . b .) the act prohibited chinese immigrants from becoming american citizens. c.) the act prohibited chinese immigrants from entering the united states. d.) the act prohibited chinese immigrants from forming chinatowns