How did satellite states in the warsaw pact provide a buffer for the soviet union?

According to subpart d, research with children may be eligible for exemption when: the children will be asked to complete a surveythe research involves the use of educational teststhe children will be interviewed by the researcher.the research with children will involve participant observation with researcher interaction.

Researchers have found that it takes to view a mental image that is larger or covers more distance than a smaller or more compact one.

Abrief, "first-step" presentation of a work to be completed is called a