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The basalt below the hominins is dated to 1.8 million years ago, and the geomagnetic polarity of the
If you want to show differences between items at the same time, a bar graph is more effective than a
Researchers have found that science instruction can be quite effective in grades 4 to 7.
Change in air temperature at various air flow rates for a 7 pass operation
Hand signals are an effective emergency backup to ra- dio communication systems. Shown are several ...
First-Pass Effect