Phân biệt phương pháp nghiên cứu thực nghiệm và phi thực nghiệm. Cho ví dụ

What policy did "jim crow" laws put in place? black codes integration segregation 2. the supreme court case that established the doctrine of "separate but equal" was dred scott v. sandford plessy v. ferguson brown v. board of education 3. the supreme court case that overturned the doctrine of "separate but equal" wasdred scott v. sandford plessy v. ferguson brown v. board of education

Write a sentence with valiant and steadfast

Which of the following situations best demonstrates the principle of separation of powers in the u. s. government? a. the president can veto laws passed by the legislature. b. the courts must approve constitutional amendments. c. states create their own educational policies. d. members of the legislature are elected by voters.