Author Question: A _________ forms a barrier through which the traffic going in each direction must pass and dictates ... (Read 84 times)

scienceeasy · **on:** Jul 7, 2018

A _________ forms a barrier through which the traffic going in each direction must pass and dictates which traffic is authorized to pass.

What will be an ideal response?

Question 2

You should try to make sure you get a representative response when you give a questionnaire.

Indicate whether the statement is true or false