Answer:
concrete
The most notable building technique introduced by the Romans was the use of concrete.
Explanation:
Answer:
blacks
Explanation:
The word 'white' has its opposite to be black
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<span>The U.S. Supreme Court hands down its decision on Sanford v. Dred Scott, a case that intensified national divisions over the issue of slavery. In 1834, Dred Scott, a slave, had been taken to Illinois, a free state, and then Wisconsin territory, where the Missouri Compromise of 1820 prohibited slavery.</span>
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