.. Planting crops on large scale on big farms with slave labour.​

Which event in the history of the americans with disabilities act is an example of a conflict between different levels and branches of government?

What greek scientist created a screw to move water for irrigation?

Pj conducts an experimental study on the effects of soft music during high stakes science testing. he randomly assigns students at the school. in one condition he does not provide music for testing while in the other group he does provide the music. he administers a pretest at the beginning of the year and a posttest at the end of the year. pj’s design is best described as a: a.static group comparisonb. pretest-posttest control group designc.control-group-time-series designd. nonrandomized control-group pretest-posttest design