Viết một đoạn văn ngắn thỏa quy tắc modus tollens .

97 points what types of changes have been made in the united states to protect people from earthquakes? a. communities are no longer located along fault lines. b. building codes ensure that structures can withstand shaking. c. warnings go off when an earthquake is expected, and people evacuate the area. d. barriers have been built to prevent flooding by a tsunami.

When and why were fingerprints first used in the united states

How is the uk’s government is solving the air pollution problem?